How Many Glofish in a 10 Gallon Tank? (Essential Advice)

Glofish genetically engineered fluorescent fish

Unlike anything else in the world of fish in aquariums is the Glofish! They are magnificently colored, spectacular fish which have had a natural fluorescence gene added to their genome, resulting in fish that are permanently fluorescent. In this article we delve into the question: How Many Glofish in a 10 Gallon Tank?

We also look at how glofish were developed and the care requirements for the different glofish species.


Introducing the Glofish

How Many Glofish in a 10 Gallon Tank

Due to bright neon colors, these fish have become extremely popular amongst beginner fish-keepers.

Genetically modified glofish are born with brilliant color, maintain it throughout their lives, then pass the color to their offspring.

Glofish have the same general care requirement, including temperature and food preferences as their non-fluorescent counterparts.

They are great in a community aquarium! The best way to experience glofish is by using blue lighting. This is included in all branded Glofish aquarium kits to help everyone ‘take home the glow!’

Glofish have been developed from several species of aquarium fish. Later in the article we consider each of these species and their individual care needs.

Glofish History- How Did They Come About?

Back in 1999 a group of scientists in Singapore were working with a gene extracted from a jellyfish that produced a bright green, fluorescent coloration. They then inserted this gene into a Zebra Danio embryo, allowing it to integrate into the fish’s genome.

These fish would then be fluorescent green under white light or ultraviolet lights. They then filed a patient on their work.

Next, they created a red florescent Zebra Damio using genes from a sea coral. The scientists then met with businessmen from Yorktown Technologies and created a deal to have world wide rites to market the new Zebra Danios branded as Glofish.

Are Glofish as Hardy as the Fish They Were Developed From?

So essentially Glofish are genetically modified, or GMO fish. Since then, there have been several new forms of glofish using other tropical fish species.

The glofish available on the market now include the Zebra Danio, Tiger Barb, Rainbow Shark, White Skirt Tetra, and Betta Fish.

The fish that glofish were developed from were all considered to be hardier- more ‘forgiving’ fish when mistakes are made with water parameters. Unfortunately, these new varieties don’t seem to be quite as hardy as their new counterparts.

So, is it that they are less hardy, or is it because they have been kept in inappropriate environments?


How Many Glofish in a 10 Gallon Tank? Things to Consider.

Types of Glofish and their colors

There is a lot of good to be said about glofish because of the bright colors. These fish are very attractive to a younger audience. They can add a great bit of color to a community aquarium.

The worst thing about glofish, is not the fish themselves, but more the tanks that are marketed for the fish.

For example; the largest aquarium kit marketed for glowfish is 10 gallons, whilst most of the species that glofish have been developed from require a minimum of a 20 to 30 gallon tank for optimal fish health.

So, you can see how this might be confusing to a lot of fishkeepers!

Another issue with these fish is that they were genetically modified to have bright lighting bring out their florescent colors. The species used to develop the glofish become stressed if kept in brightly lit tanks. As with White Tipped Tetras and Betta fish being examples of this.

The glofish are really not the problem, the problem is how they are marketed and how the products for them are marketed.

Co-inhabitants and Fish Behaviors that Determine Tank Size

Glofish cannot just be added to any community aquarium expecting that all aquatic life in the tank will be happy. Some glofish species like Tiger Barbs and Bettas tend not to get along well with others without careful planning and sufficient space in the tank.

Tiger Barb glowfish cannot be mixed with Betta fish glofish. Tiger Barbs are well known fin nippers. They will also outcompete the bettas for food.

Tiger Barb glofish are better kept in larger groups of ten fish. This reduces their nipping tendencies.

The rule of thumb of 1 gallon of water per Tiger Barb, definitely doesn’t work when considering a 10-gallon tank!

A 10-gallon tank is way too small for 10 Tiger Barbs. At the very least you would need a 20-gallon tank. Really, 30 gallons or more is better.


Wrong Advice from the Glofish Website

The glofish website does not have really good information on how to care for their florescent fish properly.

For example: the official glofish website recommends a tank of 10 gallons for a group of 6 Betta female fish. A 10-gallon tank will not be adequate for six female bettas. You would want at least a 20-gallon tank. Bigger always means better!

The truth is, while some people may object to glofish being sold on the market, as long as they keep selling, they will keep coming out with new species of glofish.

The best thing we can do is to research the specific species they were developed from and try to educate ourselves on how to best take care of them.

Focus a little less on what will best show off the bright colors of the fish, but more on the fish’s needs for it to thrive in your tank.


How Many Glofish in a 10 gallon tank? Shape Does Matter

If you do decide to house your glofish in a 10-gallon tank, then considering the shape of the tank will help your fish with finding the space to move as it would do naturally.

Tall thin tanks are less suitable. Tetras, tiger barbs and danios are schooling fish and need space to move left to right. Housing them in a longer tank is better.

The same goes for betta fish. These fish originated from shallow waters where they swim from side to side.


Glofish Species and Their Specific Needs

Zebra Danio Glow Fish

Long Finned Zebra Danio Glofish

Being the original glofish, they have developed several color strains. Today they are available in five colors: Electric Blue, Star Fire Red, Sun Burst Orange, Cosmic Blue, and Galactic Purple.

Danios require at least a 10 gallon tank. They are fast ‘busy’ fish suited for busy aquariums. They like to swim in the upper portions of the tank.

Danios are schooling fish, so they need to be kept in groups of at least five. If the numbers are too low they become stressed, which can lead to illness and social problems in the aquarium.

These colorful fish need plenty of space to swim around. They cohabitate with Tiger Barb glofish and White Skirt Tetra glofish, so long as they have room in the tank.

Your aquarium would need a lid, as danios like to jump. A filter or aquarium water pump that creates a current will excite danios. They like to dance around in the current.

Water Parameters:
  • Temperature: 65° – 75°F
  • pH: 6.5 – 7.2
  • Water hardness: 3 – 8 dkH (soft to medium)


Tiger Barb Glofish

Electric Green Glofish Tiger Barb

The glofish version of the tiger barb comes as a florescent green called the Electric Green Tiger Barb.

Tiger Barbs require a minimum tank size of 20 gallons (30+ gallons is better). Being avid swimmers, they need space to race around the tank pursuing each other.

Tiger Barbs grow to three inches if provided with the right conditions. So, having 6 to 10 barbs in a ten gallon tank would make it way to crowded. A larger tank will lessen any aggressive behaviors.

Water Parameters:
  • Temperature- 68° – 82°F (74° F best)
  • pH range- 6.0 – 8.0 (slightly acidic is best)
  • Water hardness- 4 – 10 dkH


White Skirt Tetra Glofish

Electric Blue White Skirt Tetra Glofish

There have been three glofish color versions developed from the White Skirt Tetra. These are: Electric Green, Sunburst Orange, and Moon Rise Pink.

This species is a schooling fish, with fish growing to two inches long. Schooling fish, because they need to be in numbers, require a large tank of at least 20 gallons (114L).

It is best to keep them in groups of five or more in a community tank, otherwise they are susceptible to getting their fins nipped.

Water Parameters:
  • Temperature: 75° – 80°F
  • pH range: 6.0 – 7.5
  • Water hardness: 5 – 20dkH


Rainbow Shark Glofish

Sometimes known as the Red Finned or Ruby Shark, are a semi-aggressive fish towards other species with long fins such as guppies, bettas and goldfish.

An adult rainbow shark thrives in a tank with a minimum of 55 gallons of water and an aquarium length of 48 inches. This species grows to six inches (15 cm) long and require room to move. A 10 gallon tank would not suffice.

Rainbow Sharks are bottom to mid-level tank occupants who will get along with Tiger Barb glofish.

The Glofish brand has developed a purple/pink florescent Rainbow Shark which is names Galactic Purple.

Water Parameters:
  • Temperature: 75 – 81 °F (24 – 27 °C)
  • pH range: 6 – 8
  • Water hardness: 5 – 11dkH


Betta Fish Glofish

Male Betta Fish Glofish

The betta glofish cause quite the controversy in the fish-keeping community. The glofish brand developed the Electric Green Betta with a florescent green color. The basis of the controversy is that the betta fish is already a stunningly colorful fish which is super popular with fish enthusiasts. The glofish betta doesn’t match up to the range of patterns and colors of bettas that have been selectively bred for many years.

The other problem with the glofish betta is that it doesn’t have the desired fins.

As pointed out earlier, the glofish website recommends six female glofish bettas for their 10-gallon tank. Our view is that one betta fish requires a minimum of 5 gallons or larger for it to have space to move and for water parameters to keep stable.

Betta fish are not social fish and need room between individuals. Females will tolerate one another, but will become stressed if crowded together. When this happens social problems occur and fins may be nipped.

Water Parameters:
  • Temperature: 75 – 81°F (23.8 – 27.2°C)
  • pH range: 6.5 – 7.5
  • Water hardness: 3 – 5 dkH
  • GH: 3 – 4 dGH


Final Thoughts

Whether you have an aversion to GMO developed organisms or not, the glofish are now well established with the aquarium hobby and we all agree that the colors that have been developed are unique and eye catching, especially in an aquarium with ultraviolet lighting!

Our responsibility with keeping pets is to ensure they are kept in appropriate tanks where their needs can be met that replicate their natural habitats. ‘How Many Glofish in a 10 Gallon Tank’ is not the question that should be asked, but rather; What size tank would be suited best for the species of fish intended to be kept? This goes for aquarium equipment as well- lighting systems, filters and heaters.

Whatever you decide, we wish you every success with keeping glofish.

You may be interested in our article “How Many Glofish in a 5-gallon Tank?” It is quite a different article to this one.







[Updated 2022] Molly Fish Fry Care Guide – (Main Things to Do)

Molly Fish Fry

Molly fish are tropical fish that grow extremely fast and reproduce frequently. Adult Molly fish do not have parental care, often abandon the fry and even try to eat their fry. I will show you the molly fish fry tank maintenance techniques that help protect the molly fish fry.

How do I care for Molly Fry?

Molly adult fish abandon their baby fish shortly after birth and may even eat them. In addition to taking care of the Molly fish, you also have the responsibility to maintain the aquarium, thus ensuring that your fish are protected from diseases and illnesses of any kind. Other factors that should provide good maintenance and clean tank interiors and filters include stable parameters such as temperature accuracy, lighting, and other essential functions.

Molly Fish Fry Care Guide

Basic guidelines for molly fish fry care are provided: The care and treatment of baby fish are quick and easy. Adult fish can eat fish fry from the pond, even if the mother doesn’t. Two steps make hatching a success; separate the parents from the litter (or provide enough hiding places for everyone) and take care to keep your baby animal healthy until it becomes a full-grown fish. Taking care of molly fry tanks can be as easy as cleaning them.

How to Care & Grow Molly Fish Fry

Molly fish does not demonstrate parental care; parents can even eat the fry. Female molly gives birth to babies, called “Molly fry.” They are similar to adults but a tiny, tiny version of adults. When a baby is born, he needs nutritious food.

Is a separate nursery tank for Molly Fry necessary?

The Molly fries will be separated from the female Molly fish shortly after the female give birth in a nursery tank, far from adult fish; they cannot be separated together with the female pregnant Molly fish. A separate tank for breeding (nursery tank) prevents the small fry from being eaten by other fish, increasing the brood’s survival. This information is necessary for the safe storage of Molly fry fish in aquariums.


A filtration system is essential in all tanks, including Molly’s. Check that the filter you choose is suitable for the size of the Molly fries; obviously, the devices must be secure for small fry. The best way to check the efficiency of the filtration system is through water testing. When proper aquarium filters filter the water inside the tanks, quality and sanitary standards are balanced.

Adding plants

You can choose between artificial plants or live plants to fill your tank. Also, plants must be added before placing Molly Fry in the tank. A good tip about choosing an aquarium plant is selecting plants with broad leaves, like Java fern or some mosses, which are widely common in specialty stores. This place with plants will be used as a hiding place by the fry. In addition, you can create floating plants, helping babies when there is more natural vegetation close to the surface so they can hide immediately after birth. Plants will also help with feeding small fry and other fish species if is a community tank.

Large tanks

Molly fry should have a good volume in the tank to keep the tank’s balance constant. Female mollies can produce hundreds of fry instantly – their births can reach over 100 fries. The baby Mollies needs tanks to grow, ranging from 10 to 20 gallons.

Temperature of water

Like tropical fish, Mollies should have the warmest temperature in their water tank. Keep the water temperature around 77°F. The water temperature dictates the level of Molly’s metabolism and allows for healthy feeding and growth. Use the ideal aquarium heater to maintain stable water temperatures. A thermometer can also help analyze the proper temperatures in our aquarium.


Lighting is a significant component in keeping fry ponds healthy. Appropriate bulbs protect its growth. Tanks require at least 12 hours of rest and 12 hours of light per day.

Prevention from diseases

Keep your fish constantly well fed with quality food, and the aquarium’s water quality is always ideal. Sometimes parasites and pathogenic fungi can be present in water. Babies have no immunity to diseases that can harm them. Various chemicals can help the habitat stay healthy, and there are medications of their own to treat illnesses.

Introduce Molly Fry In The Nursery Tank

Relocating your Mollies fry into a nursery tank is a great strategy to increase the number of fries that reach adulthood. Let your Molly fry in a container floating in the water of the new aquarium for about 15 minutes until the temperatures stabilize. Little by little, mix the water from the aquarium with the water containing the fry; observe to determine if they all have adapted and are swimming well. Use a net, remove the fry, and place them in the nursery tank.

Molly Fish Fry

Fry Mollies Food

Molly fry does not require specific dietary supplements, only quality foods. They can eat the food that adult fish eat. Animal-derived foods, such as brine shrimp, worms, blackworm, and bloodworm, can help fry fish to grow faster if they become healthier.

Saving Molly Fry is essential. Tell me the reason?

Keeping Molly’s fish fingerlings in a community tank can be harmful. Molly’s chicks are tiny and quickly become food for larger fish; as they mature, most animals in the tank will chase and attack them. In short, Molly Fry makes an exciting snack for other fish, including her parents. It is necessary to keep the molly fish habitat in ideal conditions at all times; this includes protecting them from all other species in your aquarium.

Does Molly eat her babies?

Yes, Molly, eat your babies. As adult parents, they may end up eating their children. This behavior does not seem unusual for ornamental fish. Mollies usually eat whatever fits in their mouths.

Hidden spots

In this way, Molly’s chicks can be protected by having enough hiding places inside the aquarium. Keeping your baby mollies safe with an artificial hiding place and other aquarium decor items is possible. However, these tactics don’t always work effectively. Be aware that hiding areas are a good idea, but it might not work very well, so take them to a separate tank.

How do I protect Molly Fry in the main tank?

As stated earlier, the only effective method of protecting fry is to keep them in a separate aquarium from their parents and other adult fish.

How long can you keep Molly Fry in a breeding tank?

A breeding tank is a simple method of keeping your fry healthy and safe. Larger female Molly generally release up to 100 fry at one time. Keep your fingerlings separated for 2 to 3 months, or until they are big enough not to be eaten by other fish in the main aquarium.

How are Mollies born?

It takes some time after birth until Molly fry reach the feeding stage. These fish reach sexual maturity from three to six months of age. As long as the adult mollies are kept in good condition, reproduction will occur without problems.

Tell me the best way to put Molly Fry in the main tank?

If Molly is kept in a mature and clean aquarium with excellent water quality, they will become quickly and easily healthier. When the Molly fry is large enough not to be devoured by your tank mates, you can transfer them to the main tank. When fish reach a medium size, other fish no longer confuse them with food. During this time, the molly fry should grow big enough to remain on the main tank without causing harm.

Regular water change

Partial water changes exist to improve water quality for Molly fry. Perform weekly water changes in Molly’s fry pond. Water changes keep contaminants dispersed in the medium at low levels, as it renews the water and prevents contamination; this increases the ability of the fry to grow better and healthier. Please do not keep fish with deficient oxygen levels and keep the water temperature stable, use a aquarium thermometer.

Fry Molly Grown Up to Adult Mollies

About four months after birth, Molly fry grows into adults. Molly fry do not have a specific color, appearing in different colors and formats about their strain. After a more extended period, they acquire their fixed primary colors and forms. These fish will get beautiful colors with a nutritious diet and a suitable habitat.

Molly fry care guide

Generally speaking, you should know these three key components when making molly fry care recommendations.

Add plants to your tank

You have the option of using artificial materials and even living vegetation. Put your plants in the aquarium before introducing the fry. These plants provide hiding places for the fry in their early ages and behave similarly to those in their breeding boxes. You can always use broad-leafed plants similar to Java ferns or moss. This effect can also be created by using floating plants, especially with long roots; spawning mops also help. Always help newborns to hide around them immediately after their first birth, this will help you to save molly fry.

Isolate the female Molly Fish

By separating the pregnant molly from the main tank, you keep her out of worry that other fish will eat her fry and prevent pregnancy from stressful for female Mollies. Keeping a female about to calve in a community aquarium is not the best method of maintaining baby Molly babies healthy, especially when you have a lot of adult fish in your aquarium. In theory, the more plants and places forming hiding places, the more fry will survive. This may seem like a simple question, but it is not always for beginners. This option of removing the female makes the molly fries easier to keep when separated.

How should we feed them?

It is recommended that fry feeds with small amounts several times a day. Remember that Molly fish fry is small animals and can only swallow food that fits their tiny boa. Feed the fry regularly, without leaving food leftovers in the aquarium. Quality food will bring quality animals. Keep a strict diet so you don’t leave your fish obese or leftover food that will degrade the water quality in the fry tank. It’s safe and convenient to store your fry in an adult-like tank. You can also offer the same food that adult fish eat; crushing before submitting crush makes the pieces small enough to fit in the fry’s mouth.

Tank and filter system setup

Breeding tanks will require between 10-20 gallons of water to raise the fry. The tank needs an efficient filtration system. Ensure your filters are free of dirt and not sucking up the fry. The filter can also be covered with foam that protects it from sucking fish and traps food residue.


Is breeding mollies a good hobby for any fish keeper. Molly fry is not very difficult to raise. Still, it is necessary to take measures for their preservation and well-being and maintain the excellent condition of the aquarium and excellent water quality. Unlike adult Molly fish, which are more robust, fry is less tolerant of an unstable and toxic environment. Before attempting to grow Mollys, you should be familiar with keeping these fish. Always try to feed them nutritious and correct food, keeping the aquarium in perfect condition for your fish.

Pregnant Neon Tetra (Guide) – Everything you should know

Pregnant Neon Tetra

The way neon tetra fish reproduce is unique and requires proper steps for successful fertilization. This entire process is unique and needs specific measures to ensure its success. Because these fish are so adorable, many fish keepers are happy to find that their Tetra neon is carrying babies. How to reproduce this Tetra to have a family of these beauties in a tropical freshwater aquarium will also be discussed.

How do I tell if a Neon Tetra is going to lay eggs?

Many novice aquarists love Neon tetras because of their glowing presence in the aquarium. Generally, a pregnant female with a neon tetra has a swollen belly, so she must lay eggs very soon. The mating and egg-release processes of these small species can be somewhat complicated. Learn about Neon Tetra and its spawn – and discover hidden facts and tips. Keep learning more!

Pregnant Neon Tetra

Neon Tetra is a brightly colored species that enjoy the company of other fish of their species. They have a socially relaxed and happy attitude. But most are very fussy about their waiting for a suitable arrangement.

Pregnant Neon Tetra

Is Neon Tetra mating?

Even the smallest Tetra can produce more than a dozen eggs in the exact spawn. If you see male swimming alongside a female, he is almost certainly in the mating process. Tetras are egg dispersers. Females release their eggs floating in the water column, so the eggs sink to the bottom of the tank. The eggs should hatch in approximately 24 hours and produce a small fry that will feed on your egg pouch the next day. Removing the breeding pair after the eggs have been laid is necessary as the parents devour their offspring.

How do I tell if a neon tetra is going to spawn

If your Neon Tetra starts to show signs of swelling in its tummy, it will likely lay some eggs. This article will help you know what to do when your Neon Tetra lays eggs. And how exactly to make them reproduce. In this article, I will also cover the complex mating of these simple freshwater species. It also helps people find out when the eggs in their aquarium are about to hatch. Let’s get into our knowledge of neon tetras.

How do you know if a Neon Tetra is pregnant?

A tetra may lay a total of 60 up to 130 eggs, which will take 24 hours to hatch. Once the eggs are loose in the water column, you must remove the breeding pair from the aquarium; otherwise, they may eat the eggs and fry.

Do Neon Tetras eat their babies?

Baby tetras are prone to get sick and are sensitive to injury. They may not survive unless you give them proper care and remove the adults from the fry tank. It is possible to put baby tetras in the same aquarium as the adults after three to four months. They will soon develop the survival skills necessary to live harmoniously with adults.

Neon tetras and breeding requirements

The most likely way to ensure positive breeding of neon tetras is to separate the breeding matrices in proper breeding aquariums. For best results, place a few smaller stones at the bottom of the tank in the egg landing areas. Small fish can be highly demanding if they need favorable breeding conditions. This requires frequent water change during spawning. Immediately after mating, neons lay some eggs, usually at dawn. As the species does not have parental care, they may eat the fry.

Readjusting the water conditions

If the neon tetra is not reproducing, you should check the water conditions and readjust as needed. Adjusting water hardness can trigger spawning by simulating rain. Don’t forget to dim the lighting. Maintaining proper tank conditions on your first attempt can be a challenge. Do not hesitate to experiment and take your time to adjust everything according to the needs of your fish. Some neon tetras prefer harder waters, and some prefer softer waters. Add a large volume of soft water to the pond and see if it makes a difference after a few days.

Removing the fish

Tetra adults typically eat their eggs, and they also consume young ones. It is again recommended to breed one pair at a time in a separate tank. Having an additional adult tetra in a tank means that the other fish end up eating the egg. You don’t want an experience like this because you cannot leave eggs in the tank in multiple pairs within a single tank. The rocks or gravel on the bottom of the tank will make it easier to spot the eggs in the fish tank by simply moving them back to their previous tank to protect the eggs. The eggs are transparent, smaller, and challenging to view.

Prep the water

Neon tetra appreciates soft water with 1-3 dH indicator. The water level should not drop below 80 degrees F. Ph levels from 5 to 7 should be adjusted to provide the ideal climate for neon tetras to breed. The breeding technique must replicate the Neon Tetra’s environment.

Setting up the breeding tank

If you don’t have a tank, buy one that’ll measure at least 12x8x8-inches. The storage tanks will exclusively accommodate the male and female breeding tetras and incubate the newborns. Set up this tank like a standard tank. Avoid plants, and don’t forget to place a few rocks on the bottom of the tank. Make the water very soft and the temperature warm enough for the breeding to happen.

Placement of the tank

These tanks usually will have low light. However, low light does not mean a dark environment. They must be placed in a location and get indirect light to provide them night and day cycle.

Pregnant Neon Tetra

Identifying the male and female

It’s not necessary to sex neon tetras for breeding because you can put a few in the tanks, and they will reproduce. To increase the success, chances start with a pair by transferring them into a separate tank.

Breeding Neon Tetras

It’s not impossible to breed neon tetras and reproduce their ideal conditions. The creation of separate hatcheries is advisable. In this section, you learn what actions they must have adopted when developing a neon tetra.

Breeding requirements for Neon Tetras

For best results, you must make a large tank with a couple of inches of rocks to make a proper landing place for eggs or babies. A lid on the device may also help protect the parents from jumping during your moment of euphoria. You should only add tetras into the tank that is fully mature with stable water chemistry. To stop eggs get stuck in leaves, remove plants from tanks.

How long does it take for a neon tetra to lay eggs?

The female neon tetra will scatter a bunch of eggs when ready to reproduce. After spawning, the male neon tetra will assist in fertilizing the eggs. The tiny fry comes from the eggs and feeds entirely from the eggs sacks in the initial few days. In four to five days, we can see fry swimming in the same aquarium. Give fry food, infusory foods, and rotifers. They can be challenging to find because they are transparent.

Why aren’t eggs of my tetra hatching?

You can separate the adults as soon as the eggs are fertilized. You can also take out the eggs from the tank instead! In addition, you must wait until 24 hours before the embryo hatches.

Tell me the time it takes for neon tetras to lay eggs?

When female neon tetra is bred, she will scatter several eggs for males to fertilize. The eggs are tiny, transparent, and quite sticky. These eggs will glide and stick to the soil. After fertilizing, the eggs can take 24 hours to hatch.

Difference between male and female Neon Tetra

Males are generally thinner with a straight blue border. A female neon is also rounder and has an angled blue line. Females are usually more prominent than males. When a female is full of eggs, their belly becomes more significant and more rounded.

Pay Attention To The Male Neon Tetra Fish Behavior

When males begin to demonstrate courting behaviors, it’s likely because the female is ready to reproduce. There are also actions that the males may be observed, which are specific dances they do when attracting the females. When they do these mating dances, the male fish sometimes swims around in square patterns while rotating in a circle. Occasionally you can notice him stop and stay still for a moment before regaining the dance rhythm. The behavior of males will, too, be a clear indication that the females are ready to lay eggs according to the behavior of a female fish.

Check their belly

The female neon tetras flange looks more rounder than usual when she lays eggs. It’s the most considerable confirmation that she will lay eggs. You can see on their abdomen if they are female.

Pregnant Neon Tetra

Is my Tetra going to lay eggs?

Neon Tetra is not laying eggs but has swollen in the belly for a long time. Let me show you what should happen if you have a sore abdomen for too long.

Is the Neon Tetra fat or going to lay eggs?

Neon tetras are increasing body mass, but they show no symptoms of sickness or pregnantness. If your neon tetras get fat without reason, then maybe it’s sick in water in your tank or something wrong. It can often be caused when high nitrate levels occur.

Is the Neon Tetra pregnant?

When the male becomes more rounded in size, he becomes very sick. To be sure if your female fish is ill or not, you must examine their females compared to the males during mating. If the neon tetra isn’t getting better from the swollen belly, it’ll be in trouble, maybe with some disease or condition.

Pregnant Neon Tetra

What should I do if my Neon Tetra is pregnant?

If your neon tetra shows signs of pregnancy, you probably have to prepare yourself to receive the fry. It’s a good idea to research a little more about this fish.

Ideal water conditions

Neon Tetra fish flourish when they live in water at 77 Fahrenheit. Soft water should be slightly acidic but have a pH of 5.5. The majority of pet shops and online pharmacies offer pH testing strips. When changing water is critical to change at least half of the water in the tank every week. It is recommended to change tank water less frequently to encourage neon tetra to breed. If they’re given this, they might decide to quit breeding when they’re not allowed to do so.

Separate tanks

The eggs are adhesives, so they should have no plants and weeds on them for egg sticking. The breeding tank should consist of at least 10 gallons of water to establish the proper environmental conditions for successful breeding. Make sure the breeding tanks have a lid to avoid your fish from jumping out of the tank. The fish can be placed in the tank during the evening since breeding can take place.

What do neon tetra eggs look like?

Neon Tetra eggs are small and round – similar in length and size to tapioca. They’re clear but usually have White or Yellow tints to them. These eggs have a similar consistency to jelly, and they can stick to plants and leaves in an aquarium. Because the eggs are tiny, they could be quite hard to see.

Adequate lighting

Neon tetra fish always do better in dark environments. Bring the aquarium to an area that would have been protected by natural light during the day. The aquarium shouldn’t need to be fully darkened but will receive only very minimal light per day. Move it to a dark place to be as close as possible to the fish and their habitat.


When you put two female fish neon tetra in the same room, they might scatter eggs for themselves. While you never see pregnant Tetra fish in your aquarium, you can be lucky enough to see a female fish ready to lay eggs.

Signs that Neon Tetras are mating or about to

The more you examine the neon tetras, the more differences you get. If you noticed your neon tetra doing a dancing movement in a square or circular movement and turning your head, you would undeniably be watching and listening to it. Fun fact this dancing aimed to attract tetras that are females! When you see the male Neon Tetras perform this exceptional dancing for the female mates and sometimes stop for some of your moments to stop them. Make sure they meet up.

Male Vs. Female Neon Tetra

Female Neon Tetra is a lot bigger than males. If you take a closer look, you will discover a horizontal blue line between male and female tetras. By contrast, you will notice a blue line curving the body of the two female tetra’s. To put things another way: slimmer neon tetra usually is male.

Specific Belly Form Before Laying Eggs

The females in neon tetra are rounded bellies due to the eggs they carry. She will spawn eggs when conditions come to perfect for it. Eggs can spawn in warmer conditions when illumination is proper.

How do I save and care for neon tetra eggs?

To keep neon tetra puppies healthy, first hold the aquarium parameters stable and optimal, without parameter fluctuations.

Managing water parameters

Neon tetras prefer soft water. The water should be a 0-2 dH indicator. For the pH level, you should go for about 5-6. Additionally, the water temperatures are about 74 degrees Fahrenheit. To maintain the parameters stable, you can look for a test kit to gauge DH water concentrations in your pet store. You can reach 70 and 75 degrees but no more or less.

Avoid newly set tanks.

Fingerlings are sensitive to water quality; therefore, avoid using unmatured aquariums. Changing the fry to another tank should only take place when the fingerlings are around 3 to 4 months old, and the water composition of both tanks must be stable and equal. You must also ensure that temperatures in the tank are maintained properly.

Changes in the water of the aquarium

You can also switch water more often to mature Neon Tetras to encourage spawning. Changing water works wonders when almost none of the factors motivate your fish to spawn.

Final thoughts

Aquarium enthusiasts and lovers love to see Tetra Neon fish; these colorful beauties are appreciated in aquariums worldwide. One point to keep in mind is that females do not get pregnant. Instead, she will lay many eggs to allow male fish to fertilize their eggs. When your female is ready to lay eggs, it is essential to place her breeders in a separate tank with an appropriate environment. Check that the eggs are fertilized and correctly applied. You would like to remove the adults in their tanks before consuming the fertilized eggs.

[Complete Guide] Kuhli Loach Care: Habitat, Size, Tank Mates, Lifespan & Breeding

Kuhli Loach

Kuhli Loach (Pangio kuhlii) is a tranquil bottom-dweller fish active in the night and a day. They are bright and easy to keep in all types of tropical freshwater tanks. There may be some negative aspects of your habits, mainly because they are constantly hidden in the substrate. Through this guide, you will learn how to maintain, feed, breed, and choose tank mates for Kuhli loach.

Kuhli Loach

Kuhli Loach is an unusual little oddball fish that makes a fantastic addition to your aquarium. They appear to be a tiny eel and scoot around a tank with crazy snake-like movements. It is a lovely addition, easy to care fish for almost every type of tropical freshwater aquarium.

Kuhli Loach Overview

The Kuhli Loaches have a maximum weight of about 4 inches and reach sexual maturity in 2 to 3 years. This fish has an incredibly long lifespan for its size, commonly living between 8 and 10 years. Keep the species in groups, giving them at least 20 gallons of comfort. These fish are found in a wild place in Southeast Asia.

Kuhli Loach

Kuhli Loach Facts & Overview

The Kuhli Loach (Pangio kuhlii) belongs to the Cobitidae family. This loach has an advantage over all its peers because of its size. It rarely covers 3-5 inches of width and does not produce much waste. Check newly acquired fish thoroughly, looking for disease or injuries; always quarantine new fish. They tend to be pretty prone to infections, so you want to make sure you start with a healthy population.

Kuhli Loach: What to know before buying this loach

The Kuhli Loach is a small loach found within the bottom of this tank. Their vibrant colors and uniqueness make this loach very popular. It’s an excellent oddball fish in a tropical community aquarium. Read this entire article on Kuhli Loach fish and why you should add it to your freshwater tank.

Scaleless fish

Kuhlis are a so-called “scaleless fish”; their scales are tiny and spread very far apart, exposing their skin. They are more vulnerable because hard scales don’t cover their softer skin. Scaleless fish can respond to salts and medications in tank water. Consult a veterinarian skilled in fish and zoology before using any drug in a tank where this species can be stocked.

Kuhli Loach Care

Kuhli Loaches are undemanding peace and entertainment fish. They rarely breed in a domestic aquarium. This guide has the information you need about keeping Kuhli loach tank, loach tank mates, and everything else.

In the wild

Kuhli loaches are omnivorous with a tendency to feed on debris, wallowing in muddy substrates. They are usually found in small groups of up to a dozen. The fish originate from rivers and streams in Indonesia and Malaysia, characterized by soft and slightly acidic waters. Because of this schooling behavior, you will need several groups or more per tank. Since most fish species are caught in the wild, it is best to mimic their water parameters as much as possible.

Care, tank size, breeding, and loach tank mates

Kuhli Loach is a peaceful fish and gets along well with other fish. This species is distinct and exciting, so many home aquarium owners commonly use it.


The Kuhli Loach is a small loach that grows up to 4 inches long. The body is pink-yellow, having 12-17 thick dark stripes. The fish has an albino morph that was bred artificially, and it’s not available in the wild. Its spine contains two rigid segments that are designed to offer a protective stance from a predator.

Should you keep Kuhli Loach?

Kuhli Loach is a fantastic fish to put in your tropical aquarium. They have a scaleless look that renders them more delicate. Preventing injuries and infections is probably the biggest challenge in keeping them healthy.

Tank Setup

Loaches, like any fish, need regular water changes every week to stay in their best condition. Weekly, clear the wastes off the gravel and collect all leftover food immediately after feeding. Loches need a tight lid; they like to jump.

Difficulties in keeping Kuhli Loaches

Scaleless fish are generally more sensitive to diseases, poor water conditions, and medication. The Kuhli loaches are especially vulnerable against Ich. Bacterial and fungal infections are also common in Loaches. Poor water conditions cause problems by decreasing fish immune responses. Ensure the filter outlet is not a place of escape or injury for the Kuhli; these loaches love current and often get stuck in the filter units! In specific filter designs, a filter impeller has no safeguard mechanism, which will kill a curious Kuhli.

What size tank do Kuhli Loaches need?

They’re peaceful and can easily be kept with other communities fish like tetra fish, rasbora fish, and even betta fish. These loaches tend to be shy and like to find shade; therefore, they provide many hiding spots and aquarium plants for their habitat. Also, they will appreciate any smooth substrate which is safe to dig into as they scavenge for food in the bottom of the aquarium. The species enjoy soft substrates, which are safe to use when the creatures explore inside the deep shallow bottom to find food.

Care and keeping in a tank

Kuhli loaches are lively and undemanding fish, but their absence of scales limits their keeping conditions. It’s essential to offer fish with clean and stable water parameters and efficient filtration and aeration. At this stage, you must pay attention so that they do not get caught in the hose during the water change and siphoning of the substrate; this happens quickly with these fish. You should carry out weekly maintenance, change the water, clean glass and substrate, and remove food scraps and other debris.

Kuhli Loach Tips

Kuhli loaches are more vulnerable to diseases and parasites than other fish species. These fish are often the first ones in your tank that are infected; they do not have skin and are more prone to skin diseases. It would be best to vacuum your substrate every time you clean your tank (every week). These are also more susceptible to cuts and scrapes (mainly when the substrate is too rough). Skin injuries are visible on fish with minor to no scale. They do essentially all they do in the substrate.

What do Kuhli Loach eat?

Kuhli loaches are great at cleaning up crumbs left by other fish. They prefer stagnant foods, including frozen pellets and blood worms. Unlike other loaches, their diet is not known to include snails or shrimp. Try to feed them when the lights aren’t on, and you’ll notice the chubby, adorable little ones. If the other fish you have in your tank eat everything before the Kuhli Loaches get to them, try feeding them overnight.

Feeding Kuhli Loaches

Kuhli Loach is omnivorous, carnivorous, and opportunistic. The eel-like bodies and sensitive bristles allow them to detect and hunt earthworms, small shrimp, daphnia, and other aquatic insects. They are not very picky and generally prefer prepared foods such as flakes or pellets. In a busy aquarium, they sometimes don’t eat anything and gradually starve to death. The sinking of carnivore pellets made from insects or shrimp ensures that the Kuhlis are adequately nourished. It seems best to feed them at night when in a busy aquarium. So beware of underfeeding and overfeeding, as any remaining food can rot and increase the ammonia level.


Kukhli loach likes the following live foods: bloodworm, tubifex, brine shrimp, daphnia, etc. Many aquarists feed their animals’ frozen food. Loaches can eat snails very rarely. You are free to use chips, but the most practical format is sinking beads. They reach the bottom of the tank very slowly and stay longer than flakes.


Kuhli loaches are omnivorous fish. They eat larvae, small crustaceans, and plants found in the riverbed. These loaches are also known as scavengers. To give them a balanced diet, you can also feed them fish flakes or pellets. Chips and pellets are ideal because they will quickly sink below submerged and easily be eaten by your loaches.

Behavior & temperament

Kuhli Loaches prefers to keep things quiet while they’re still in their favorite hiding places. They spend their time digging deep into river beds and searching for food in their wild natural habitats. You won’t see a Kuhli swimming in the water column very often. They are gentle fish but can irritate other creatures when they are alone. Some fish can use their sharp-tipped spines and fight. Though most fish rarely use them for much of their livelihood unless they have a good reason to do so.

Kuhli Loach


All loaches should be kept in a school a minimum of five resident Kuhli for a tank to help them feel comfortable going out as a group. More caves, rocks, and hidden places. Think about people in this way as extroverted, shy introverts. They need each other to avoid excessive stress. They might emerge from hiding only in the early morning if more than one species is in the tank. They are comfortable with diverse kinds of fish even if they’re not good friends.

Ideal tankmates

Kuhli loaches spend most of their time under the surface, digging into the ground. Using these fish together with species that inhabit the surface is standard. Peaceful species, including Tetras, Danios, or Rasboras, are a good solution. Avoid violent fish like cichlids, black tiger barbs, bass fish, and Arowana. Small gouramis are an excellent choice if you want fish to prefer swimming in the middle of the tank. Nonviolent creatures like Corydora and Red Cherry Shrimp work great as other background denizens. If you wish to a multi-species aquarium, you can go with fish that live elsewhere in the water column.

Kuhli Loach Tank Mates

Kuhli Loaches can be kept with virtually all species of fish. They are small and squirm-like worms, making them tempting target animals for predatory fish. Some types of fish are particularly problematic because these loaches live at the bottom edge of ponds, and because of this, they can be an easy target for a predator to feed on easily. Loaches prefer to be left in small groups or schools. Unlike schools of fish that move in a coordinated group, schools are loose associations where each member leaves and returns regularly. The condition of the tank is also very important for keeping these fish. The only real problem is making sure your other fish don’t harass Kuhli.


Kuhli loaches don’t demonstrate schooling habits, but they are more comfortable with a group of 4-5 or more fish. Corydoras, bettas, neon tetras, or angelfish are wonderful loach tank mates. Some fishes are not recommended to put in one tank with loaches, such as red-tailed black sharks are not the best tank mate.

Gender, Breeding, and Reproductive Considerations

If you want to try creating Kulli Loach, this can be a challenge. Adult females are generally larger and rounder than males. It would help if you had very accurate and stable parameters for playback success. There are many floating plants under which eggs can be laid. Requires dense plants for spawning. The more adapted the environment is for them, the more likely they are to start spawning.

Gender differences: male vs. female

Gender dimorphism is weakly marked, so it is a challenge to see between male and female fish without practice. Males are a little smaller and have a narrower body and a very flat abdomen, and the pectoral fins are larger. Females are rounder, with a giant belly, and this can be easily seen. In fish with eggs, their eggs appear as thick greenish patches of elongation on their abdomen. A male has a pectoral fin whose first rays are thickened and branched. Almost cylindrical female adult body; the abdominal cavity is rounded, some swelling may be noticed near the anus.

Breeding Kuhli Loaches

The best bet is that approximately eight loaches will fit into a 20-gallon tank with no other fish. The aquarium should have a fine sand substrate and be filtered with a minimum primary biological filter. The bigger the tank, the better, as it provides more space for fish and plants, as the fish are as comfortable as possible. It is worth adding live plants from surfaces to shade the aquarium; plants like water lettuce and java moss. The loaches’ eggs are glued to the roots of the floaters after spawning, allowing you to move them to another tank. Eventually, the eggs will fall out and become trapped by plant roots at the bottom of the pond.

Breeding tips

Kuhli loaches are not mature till about two years old. When they have begun to reproduce, females become balloons. Somewhere in their bellies, green eggs appear. Eggs are generally placed under the plants, so they should be challenging to spot. Eggs only take 24hrs to mature, and the fry will feed on infusoria found on your live plants. Feed fry frequently for optimum survival. You could supplement this meal with fresh brine shrimps or crushed shellfish. You don’t have to do that for results.

Kuhli Loach


Kuhli Loaches are communal spawners, and therefore if kept within their species, the chance of spawning would be increased. Females will use floating plants to lay their eggs, and dense vegetation will also help support spawning. The better loach is at your aquarium, the more likely they are to spawn. You can feed the fry with the Infusoria or brine shrimps or commercially prepared fry food for a first meal. The fry usually proliferates up to an inch long within about six weeks. If you have too many eggs, you must transfer them to the right tank before they spawn.

Do Kuhli Loaches breed in aquariums?

Kuhli loaches are generally not bred in captivity, but if you want to encourage them, give them a large amount of food and add a thin mass of java moss to provide good hiding places. Just keep a decent group, and you won’t have a problem spotting them wandering around Anubia’s roots. These different fish are easy to maintain, unique in appearance, and readily available at most local pet stores and fish stores.

Are Kuhli Loaches right for you?

Kuhli Loach is a tiny, peaceful fish, vulnerable to attack. They’re an exciting addition to a community tank, but if you have giant, mean fish like cichlids, they won’t be able to get along peacefully; loaches will not thrive as long as they live together with a predator. They need lots of hiding places and like to be kept in a heavily planted or decorated aquarium. They are lovely little creatures with a big job of helping to cycle debris in the tank, and they don’t pollute the water with too much biological load. They are unique and valuable, and who wouldn’t want that?

Kuhli Loach diseases

Kuhli Loaches are particularly likely to be affected by infections and parasites. The soft and faint scales allow the disease to grow in your body faster and efficiently when compared with other fish. The fish respond to even subtle changes in water. The key to a healthy and happy lifestyle is providing the best water quality and tank setup available. These include a nutritious diet, excellent water quality, and an environment that they love. Without proper treatment, Ich may be fatal and cause more problems in the ecosystem. The first sign of Ich is tiny white spots lining the body of your fish.

Difficulties in keeping

Kuhli loach likes clean, steady water. It is necessary to change the water periodically; during maintenance, you must also siphon the bottom to remove dirt and debris; in this way, we keep the water in the tank always in optimal condition, avoiding ammonia peaks. This loaf is always hidden somewhere at the bottom of the aquarium. Fish can usually be seen in the morning or by turning off the lights after feeding, especially when kept in a tank alone, but it’s not impossible to monitor the fish at any time.

Take care

These fish are cylindrical, small, and have scaleless bodies. They are at risk of getting diseases like Ich or white spots. The most common condition is Ich, but loaches are always the first target. Another common problem is parasites. If fish can eat healthy foods but not gain weight, they likely have some internal parasites. Try to maintain good water quality with an adequate environment that meets the needs and a healthy and balanced diet. Inspect and keep a well-balanced aquarium with quality water and well-fed fish in optimal condition.

In summary

Caring for Kuhli loach may seem a little intimidating at first, but it’s not daunting once you get to grips with them. These fish are great additions to our community tank, but they also do well when kept alone. Overall, we’re big fans of Kuhli Loach and highly recommend it to tank owners who want to mix it up a bit!

[Surprising Facts] How long can a fish live out of water?

How long can a fish live out of water

Fish require oxygen; they also need to breathe. Jumping behavior can be caused by adverse conditions in the aquarium or pond. If you see fish jumping, be sure to check the water conditions. It depends on a series of factors in the water parameters so that the fish have some atypical behavior when breathing. Few of them are adapted to live temporarily or entirely out of water. And this calls our attention, for when the fish are on the outer surface in search of atmospheric oxygen or even stay out of the water, on the banks of rivers and lakes, and even in regions above the water level in aquariums. But How long can a fish live out of water?

Average survival time fish can survive out of water.

On average, fish can survive 8 minutes outside the aquatic environment; others survive hours outside the water, in addition to some species that are semi-pulmonary and manage to leave the marine environment and usually persist for hours, days, or months. Saltwater fish species tend to live longer, and some fish, such as amphibious fish, are specially adapted to being out of water for a long time, oxygen through their skin. In addition to having cutaneous respiration through the skin, they can partially absorb the oxygen that exists in the air; when the mucosa of the coat of these animals starts to dry, for reasons of hydration of the fish or amphibian, they back in the water.

How do fish breathe underwater?

The fish’s unique respiratory system uses the gills to allow water to enter and extract oxygen. There is a way of saying that the reorganizing gill does the same job as our muscles absorbing our oxygen. Fish move by currents to absorb oxygen dissolved in the water. Some fish can live for several days on land and breathe water or absorb oxygen with their skin. They are usually amphibious fish and more giant underwater creatures capable of storing air. But in the aquatic universe, not all marine animals have the same respiratory process. Some invertebrate animals, such as corals and jellyfish, do not have a respiratory system, and these gas exchanges take place directly between the body’s cells and the environment. In the case of whales, which are mammals, and sea turtles, which are reptiles, they can stay in the water for long periods, but from time to time, they need to swim to the surface to capture oxygen from the air and breathe. These animals, unlike fish, do not have gills but lungs.

How long can a fish live out of water

Why do fish leave the water?

Fish are mostly known for swimming in the water and not jumping out of it, aren’t they? However, some fish tend to bounce, and some can jump high. Fish tend to jump for various reasons, the most common being when the fish is hunting or being hunted. Jumping is a suitable defense mechanism to fish survive. The fish being hunted can temporarily escape its predator and confuse it like the predator will not see where it has gone or predict where it will fall. But in some cases, there may be some change in the water parameters; low oxygen makes the fish seek atmospheric air (breathe air) and start jumping or swimming on the outer surface.

Species of fish that can breathe out of water

These distinctive fishes can survive and even thrive on the surface longer than those closest to land. They might not look like pets that could be kept in an aquarium, but they certainly are fascinating creatures.


They are known for their distinctive appearance and size, as they survive in the ocean and are amphibians. They have adapted especially to stay out of the water, living on land with their pectoral fins placed in front of their bodies to support them to move and jump over muddy surfaces and even climb trees and lower branches. They can jump more than two feet with their fins. Its skin had blood vessels expanding. Ability to move in swamps and mud from birth. They adopted the breathing method. They have to deliver oxygen directly to the arterial circulation. They are known for their distinctive looks and size because they survive in the ocean and are amphibious. They have adapted to living on land with their pectoral fins placed onto their bodies to support them in moving and skipping across muddy surfaces and even climbing trees and lower branches. With its fins, they can leap to more than two feet with their fins.

How long can a fish live out of water

Lungfish, the fish survive out of water.

The favorite fish for pet fish is Lungfish, and are descendants of the ancient Osteichthyes and are the only class of fish that retain air circulating throughout the land, lungs, and fins. Six plants were discovered in South America, Australia, and Africa. They use lungs and glands because their habitat tends to dry out, and they go into a phase called “aestivation” – a type of numbness that comes when they use theirs. These fish are found in freshwaters, such as lakes or rivers, and can fish live dormant for up to four years. After these long periods out of the water, they return to the water, but this varies according to seasonal rains and river smells.

How long can a fish live out of water

Eel is a type of fish that can breathe out of water.

Eels are elongated species of fish, often found crawling on the sand and rocky surfaces. They can swim under obstacles at any time and downriver like dams and develop breath through their skin. It also lives below deep water but burrows and hides in the mud along rocky shores. Many call them walking catfish for their ability to crawl over ornaments. The metabolic rates of these fish can vary a lot precisely because of the ease of changing the environment, land, and water.

How long can a fish live out of water

Climbing Perch walking fish invasion

This species of fish has a gut and a lung, making it highly adaptable to complex environments. They are invasive, meaning they can thrive in another territory simply by changing their diet. They are expanding out of their native areas such as Papua-Neuve-Guinea or Australia. They can live on the surface for 6 to 10 hours out of water. Anabas testudineus is a species of fish in the Anabantidae family, the climbing gouramis. It is native to Asia, where India and China occur.

Factors determining the duration of their survival

How long a fish can survive without water depends on its species, metabolism rates, and oxygen. Fish have a slow metabolism, and those who live in cold water can generally maintain their long-term survival. In the long run, fish will require more oxygen for their recovery. Some fish species can breathe without water for several hours to several months. There are catfishes extremely resistant to breathing out of the water due to their high mucosa production and being semi-pulmonary. Lungfish are famous for their historical adaptation to living in the most diverse climatic conditions.

How Long Can a Lungfish Live Out of Water

Lungfish of the order Lepidosireniformes can enter a dormant state (estivation) during periods of desiccation, that is, when there is a reduction in the water level in lakes and rivers. During this period, these animals have low metabolic rate and body temperature and some lethargy and appetite inhibition. African species burrow into the mud, forming a cocoon of mucus, and they can survive in these conditions for up to two years. The South American Lungfish show similar behavior, except mucus formation, whereas the Australian fish (with only one lung) does not show such behavior.

freshwater fish lungs survive out of water

Lungfish appeared in the Devonian Period, 400 million years ago. These animals have a bony endoskeleton and lobe fins and are included in the Class Sarcopterygii (fish with fleshy fins), Subclass Porolepimorpha, or Dipnoi. Commonly known as dipnoic, Lungfish are further subdivided into two orders: Ceratodontiformes, composed of species that have only one lung, and Lepidosireniformes, which includes fish with two lung sacs. Abundant until the end of the Triassic, 200 million years ago, currently, only three families and six species of Lungfish are recognized. These animals are characteristic of freshwater environments, inhabiting lakes and rivers, and are restricted to Africa, South America, and Australia. Australian Lungfish have a physiognomy similar to fossil forms, with a compact body with large superimposed scales and large pectoral and pelvic fins; on the other hand, African and South American fish have two lungs, whereas, in Australian fish, the left lung sac is atrophied.

Characteristics of fish that live out of water

Among the main characteristics of Lungfish, depending on the species, one can mention their elongated body, similar to that of an eel, without a defined tail fin. On the other hand, these animals have long, fibrous pectoral and pelvic fins in constant motion, investigating the environment. These structures have susceptible extremities, allowing the fish to detect changes in water pressure and turbulence, which, together with its keen sense of smell and taste, compensate for its low power of vision; these fish are practically blind, distinguishing only the shape and movement of objects. Thus, the sensory structures present in the fins, lateral line, and snout (electroreceptor organs) increase the perception of Lungfish about the environment, helping their search for food and protection. The lateral line can even present different distribution patterns of sensory organs (pores), allowing the identification of species, which can reach up to 2 meters in length, weighing about 10 kilograms. In general, Lungfish breathe through gills during the young phase of their life cycle (especially during the larval stage), which are lost, in most species, as the fish develop. In this way, these fish start to breathe through their primitive lungs. Lung formation occurs through the connection between the alimentary tract and the swim bladder, lined by numerous blood vessels. To live, dipnoics place their muzzle above the surface of the water, opening their mouth to suck in the surrounding air, producing a distinctive sound. All species perform this procedure, except for the Australian Lungfish (Neoceratodus forsteri), which inhales air through its nostrils, and breathes most of the time through the gills (when the water is well oxygenated); on the other hand, when oxygen levels are reduced, this species uses its primitive lung to supplement its respiratory rate, capture dissolved oxygen. As in terrestrial vertebrates, gas exchange in Lungfish occurs in small vesicles located within the lung sac. In addition to the partial loss/disposal of the gills, Lungfish also have teeth that fuse to form dental plaques used to chew food. These animals are omnivores and consume fish, crabs, and lobsters and can also act as cannibals. Regarding reproduction, the dipnoic deposit their eggs in nests that they burrow in watercourses (some species also deposit their eggs in aquatic vegetation), and there is parental care on the part of the male. During the reproductive season, males also develop fleshy lumps on their pelvic fins, formed by capillaries that release oxygen from the blood into the water, increasing the concentration of this gas around the newborn offspring.


Yes, fish can survive outside water, but How long can a fish live out of water will depend on what species they are. Generally, fish breathe by absorbing oxygen from the water using their gills. However, several species of fish have adapted to live water, absorbing oxygen through their skin. Some fish, such as West African Lungfish, can even survive out of water for several years in periods of conditions (hypoxia).

Fish that don’t need filters (Everything You Need To Know!)

Fish that don't need filters

Fish that don’t need filters:  Of course, the cheapest tanks are unfiltered, and most people want to know if they can keep their fish in an unfiltered tank. Every fish does not need oxygen to breathe. But some species can absorb oxygen directly from the air in addition to oxygen dissolved in water. Among them are the Bettas, Gouramis, and other Anabantidae. Let’s talk about how these fish work and what precautions we should take with this type of assembly.

Why do fish need a filter?

Fish never come out of the water to do anything except getting oxygen, in the case of semi-pulmonary fish. The main excretory product of fish is ammonia, which they release into water directly. The increase in the ammonia level in the water depends on the number of feeds given to the fish, the quality of the meals, the excellent acceptance of the feeds, correct maintenance, the size of the fish, and the volume in the tank. The less they feed and excrete, the less they pollute the water. Some fish are also hardy, which means they can survive even in unfavorable conditions. But that’s not to say that, in the long run, it doesn’t cause severe problems for them or might even malfunction.

How fish breathe underwater

The gills or gills facilitate what is called water breathing. The water enters the fish’s mouth and goes to the gills. There, the blood receives oxygen. It then expels carbon dioxide through the operculum, the holes on each side of the fish’s head.

Examples of fish that don’t need filters or heaters

A goldfish is one of the most common aquarium fish. Does not require filtration or an electric heater. Guppies are excellent pets that can survive without heaters or filters. The Danio zebra is an inexpensive fish that makes a good pet for an aquarium. If you want to maintain a healthy aquarium and well-stabilized water parameters for your fish, you should change the water frequently. It is always essential to clean the bottom of the aquarium, where waste is concentrated. Partial water change helps bring ammonia levels below a critical level.

Why do fish need a water heater?

Fish depend on the temperature of the water in their environment to control their internal temperature. In their natural habitat, some fish prefer cold water, while others prefer warmer water. If you have cold-water fish in your aquarium, you don’t need a water heater because their temperature is suitable. For cooler climates but you want freshwater fish, a heater is required. Now that you understand the reasons for using the filter and heater, I’ll give examples of fish surviving without them. Examples of fish without a heater and others without a filter.

What kind of fish can live in a bowl

Most bowls are tiny, without filters or decoration. Fish that are very hardy, tiny, and potentially cold-water species are recommended. Tough fish like the white cloud goldfish can handle variations in water parameters more smoothly. Small fish in small space and less water and can make great bowl choices. Coldwater fish may require a daily routine water change. If you don’t have a heater, you probably don’t want a fish that doesn’t need a constant temperature of 78F like a Betta fish if you can’t heat the water. Smaller species such as Scarlet Badis are good choices.

The best fish to keep in a fishbowl

Bettas are by far the most suitable fish for bowls. We also have White Cloud Minnows are small fish but very active, with small red tips, but they like to swim in shoals. They are super resistant and can tolerate significant variations in water quality for some time. They live in cold water, and therefore you don’t need the heater. If you add some snails or shrimp, they won’t bite these animals.

Types of fish that should not be kept in bowls

Fish that are predatory and large should not be thrown into bowls. This type of fish requires a much more intense filtration and oxygenation system to supply its minimal needs. Here are some excellent examples of fish you should avoid: The oscar fish, discus, angelfish, plecos, and more.

How we reviewed

We have experts that have worked on animals in pet stores who have observed our species observing it. The main characteristics we studied are their prices, colors, and the easy maintenance they provide. We’ve tried being as objective as we can about these fish.

Betta fish is a perfect fish for a bowl.

Lush-looking fish, famous for their long, colorful tails. The male is highly aggressive with fish of the same species, while females can live with others. Contrary to what many people believe, it should not be kept in aquariums smaller than 10 gallons. It is a small fish, which stays alive in a bowl without a filter. Still, it is necessary to keep it with heaters to avoid sudden fluctuations in temperature, depending on where you live, especially in tropical regions where temperatures fluctuate daily. But the most important rule is to always keep one betta fish per bowl. It’s a fish with an enormously vast range of colors.

Fish that don't need filters

Least Killifish

These small fish are very easy to care for and are an excellent choice for those looking for a species they won’t spend a lot of time with. Due to their small size and peaceful nature, you can have them in large groups and with a wide variety of other species. Many modern aquarists know that these fish are average fish, especially males because they have them in their tanks. There are big fans of killifish, especially if you plan to keep the water temperature lower. You can have a variety of aquatic plants and mosses; they like, decorate, and help in the general stability of the water quality, making partial changes less frequent. It’s a fish with a wide range of colors.

Fish that don't need filters

Zebra Danios easy to take care

Zebra Danios has a loyal following in the freshwater aquarium community. It’s a lot of fun to see these fish playing and swimming in groups. You can keep them in small, warm aquariums without worrying about their diet or interaction with other fish. With a temperature range of 20°C, it is possible to keep these tanks at lower temperatures without problems. They are not fish that require a biological filter if the water changes are correctly done. These fish are important because they have a longer lifespan. They have very soothing properties that you can combine with many different plants.

Fish that don't need filters

The Danio Celestial

Galaxy rasbora is one of the few freshwater species that we keep in cold water tanks. These fish are peaceful and friendly. The Danio Celestial Pearl, a famous name, is an exquisite species that many aquarists love small fish. Do not exceed 1.5 inches. So it’s pretty evident that they don’t need a lot of gallon tanks. Their colorful pattern makes them a fantastic choice for any aquarium looking for some color. Despite their unique characteristics, these fish sometimes don’t stand out from others and can become challenging to identify in the wild based on their appearance. They are best for small, well-designed aquariums. They were widely used with shrimps and low vegetation aquariums. They usually stand out more quickly in aquariums with a white background and green plants.

Fish that don't need filters

Empire Gudgeon

Empire Gudgeon is full of exciting colors and behaviors. Plus, it’s easy to maintain. You will need some maintenance from time to time, but if you have built an excellent habitat. They can thrive in all water conditions and are easily kept in cold water. They also have beautiful colors. Most aquarists know them because most like them in small bowls, up to 10 gallons. They adapt well and have unique and striking behavior. They are very active and interact with the aquarists, especially in the feeding frenzy. And it’s another variety of fish that lives well without a filter.

Fish that don't need filters

Paradise the strikingly colored fish

Fish with a striking appearance, drawing attention due to its blue and red stripes. It’s not a very peaceful fish; it can be territorial. Keeping it in a minimum school of 6 fish can help reduce aggression. A properly sized aquarium is also essential. They are resistant to variations in water parameters, quickly adapt to various types of feed, and are very fond of plants in their environment, which also helps avoid any conflicts.

Cherry Shrimp in bowl

Neocaridina davidi has an excellent reputation among fish farmers in Asia for its bright, Skittl-like tones. They can be easily bought and sold at pet stores. Start with 10 or 20 prawns for a 10 gallons bowl, make sure they keep enough calcium and minerals in the water, and soon you’ll have beautiful baby prawns. Shrimps were originally brownish-gray in appearance but have been cultivated in many. They will not exceed 2 inches. Different colors like blue, red, white, red-orange, and black. They can be combined with galaxy rasboras, but you must pay attention to the general quality of the water, maintain more intense maintenance and try to offer the best quality feed possible. And it doesn’t need a heater or filter.

Medaka Ricefish

This fish carries two names. Medaka rice fish and Japanese rice fish. Some believe that some of these fish should technically belong to the killifish family. This species is an excellent choice if you want a fish that will get along with everyone. This fish is simple to feed and maintain, and it also reproduces quickly. This is undoubtedly a species to consider for fish to put in bowls with little water gallons. They are very resistant to temperature changes, in addition to having good tolerance to suitable pH ranges. They adapt very well to other fish of the same size and behavior.

Pygmy Sunfish is an excellent small fish.

The pygmy Sunfish is a cold-water fish; it handles low temperatures very well, it doesn’t do well with high ones. They have striking but straightforward colors. It is a popular fish for its distinctive appearance and ease of care. It is a species that has a dedicated following among aquarists for many different reasons (besides color). If you love the color red, green, and blue, you will love this fish. This species is highly vibrant and will add a new visual dynamic to any aquarium they live in. It is remembered that colors vary from females to males. It has a peaceful behavior and loves to be among plants and mosses.

The curious kisser fish

Fascinating fish are due to their behavior of “kissing” other members of the species. This behavior is believed to be linked to dominance disputes among fish. It is peaceful but can become aggressive towards other Gouramis. It should be kept in large aquariums due to its size, reaching many tens of centimeters.

Pethia conchonius, the famous barbs.

Pethia conchonius is a fish species whose adults are found in a slightly lotic environment, but they occur in numerous types of habitats, from streams to deeper water tributaries. Distributed in Afghanistan, Pakistan, India, Nepal, and Bangladesh. Reported from Myanmar. Introduced around the world and very popular with hobbyists. It is one of the most resistant barbs, undemanding, and impressive coloration during the breeding period. Wild specimens vary in color and size according to the region of occurrence. Selective breeding has produced several ornamental strains, including long-tailed, super red, neon, and gold forms. It has also been hybridized with some congeners, although apparently, the offspring of such experiments are infertile.

A one-sided livebearer or Jenynsia

The one-sided live bear is a simple but elegant fish that can thrive at cooler temperatures. This species is peaceful and hardy. It is usually best to store this species exclusively in a 10-gallon tank. Its name comes from the relationship between the two sides. Its behavior is quite exciting and should please any breeder! If you are interested in creating, it might be of interest to you, if you will. They are known as cold-water species. It thrives in high-density cold water in aquarium waters. It is a genus of freshwater fish in the Anablepidae family. Like Anableps species, they are unilateral carriers: some sources indicate that they only mate on one side, “right-handed” males with left-handed females and vice versa. However, other sources dispute this. But it’s a fish that you can easily keep without a filter.

Hillstream Loach or Balitoridae

Mountain loaches (Sewellia lineolata) eat brown diatoms and green algae. Hillstream loaches have more ideal water temperatures and a pH ranging from 6.6 to 7.8. If you’ve fed them well, you’ll notice their breeding habits, and babies show up everywhere. In addition to eating seaweed, they like good quality Repashy foods in gel and wafer. They are still water fish, but keeping the partial change at least three times a week is interesting. Quality power and correct light. However, it is a freshwater fish from currents, so, interestingly, you have a circulation pump to keep oxygenation high.

Trichogaster trichopterus – Blue gourami

Peaceful species, when in properly sized aquariums, can become territorial in small aquariums. There are several types of coloration, and fish are considered to be very resistant. Its behavior will vary from individual to individual, although it is often considered peaceful and recommended for community aquariums. Some individuals can become aggressive as they mature, especially when kept in a small aquarium or a few plants.

have plants in your bowl

Plants not only help to improve the appearance of the aquarium, but they also provide many benefits. Aquarium plants go through the photosynthesis process to grow during the day (or when the lights are on). They absorb carbon dioxide from the water (produced by the by-product of fish respiration) and use light as energy to convert this dioxide into oxygen.

Conclusion of fish live without a filter

Not all fish can withstand unfiltered water, but the ones mentioned are tougher and more challenging than others. Always keep your fish warm when needed. This way, you can keep your fish for many years – although you cannot constantly filter your water. The notion of owning a fish without a heater and filter may seem strange to some. The strange feeling that fish are going to die from lack of care. But this will save you some money and allow you to experiment with maintaining a more natural aquarium. We are committed to making our guides the best they can be, and we appreciate the help of our readers to help us prevent our fish from being kept in cold water tanks without filters.

The Ultimate Red Tail Shark Care Guide

Red Tail Shark

Red Tail Shark (Epalzeorhynchos bicolor) is a tropical freshwater fish native to Thailand. It has been detected in the clear waters and floodplains in the basin of Chaos Playa; nowadays, it is classified as extinct. It is famous for its striking appearance with a completely black body with vibrant forked red tails. In captivity, you should expect your fish to grow to 6 inches, with the majority staying around 5 inches. It should probably live to about six years old. It’ is an omnivore; it will eat anything you put into the tank and should not be confused with the rainbow shark.

Summary of species

The Red Tail Sharks (Epalzeorhynchos bicolor) is a freshwater fish from Thailand. The species has been declared critically endangered. The majority of their body is black except their red caudal fin. The Red Tail Shark population was highly condensed in Bueng Boraphet, Thailand. It has been verified that this fish is still in the wild; their numbers are only a fraction of what they once were. There are things about keeping it in the aquarium that people don’t know about. We only recommend getting one if you are fully convinced of the commitment and responsibility for its maintenance.

Red Tail Shark Appearance

Redtail shark has a deep blackhead offset with a red forked tail. Red Tail Shark are often confused with Rainbow Shark. Both belong to the Cyprinidae family, but they are, in fact, separated species. They should be expected to grow to about 6″ with most going to 5″. At your age, there’s no discernible difference between females and males. Don’t keep Rainbow Shark together, as they’ll fight; more on compatibility and their tankmate section.

Red Tail Shark

Red Tail Shark: Tankmates, Care Guide and More…

The Redtail shark is incredibly active, which will bring plenty of entertainment to everyone who watches it. Due to their non-fussy nature, they are straightforward to feed, and once in their aquarium, they should not offer too many difficulties to remain happy. Read our free guides to learn more about fish diet and habitat.

Is the Red Tail Shark Right for your aquarium?

The Red Tail Shark is an exciting and beautiful fish. They present several challenges for beginner fish keepers, mainly because of their territorial nature; they need large aquariums. If you have space in a sizeable suitable tank, many territorial characteristics may be avoided with plenty of hiding places. We hope the guide has helped you decide if they are the right fish for your aquarium.


The Red Tail Shark is predominantly dark black with a brightly contrasted red tail and white point on the dorsal fin. These hardy and curious fish add personality to an aquarium.

Red Tail Shark 2.5 inch plus

Red Tail Shark has a black body with a red tail that almost looks like a black shark. There should only be one Redtail shark in your tank because as long as you keep them in multiples, their aggressive and territorial behavior will get worse. Avoid the temptation to keep them with Rainbow Shark or other Black Sharks. White Tails sharks can be highly active but territorial when in multiple pairs. Those red-tailed black sharks have an aggressive and very territorial nature.

Red Tail Shark Size

Red Tail Shark

Red Tail Sharks usually grow up to 8 inches when fully grown. It is dependent on an environmental and genetic conditions. We don’t know anyone who has a Red Tail less than 3 inches. The average size tends to be at the higher end of its range as long as you give them proper care.

Behavior & Temperament

Redtail sharks are incredibly active fish and have fun to watch. You will often watch these sharks swim near the bottom of the tank. This species has a very territorial nature that needs to be considered when choosing to put those sharks in a community tank to feel comfortable. All other offensive tendencies displayed will be exaggerated because of lack of space or by the wrong tankmates. They need to find space and need to own space at camp. The easiest way to keep active fish well in an aquarium is by giving them space and the right conditions to reduce stress.

Typical behavior

These kinds of sharks are aggressive with fish that bother them. As he matures as an adult, they become territorial and pursue other fishes until they reach exhaustion. In a vast tank with a wide number of hideouts, you can keep a group of sharks. Each fish need at least 10 gallons of the tank to use as a hideout. Red Tails are aggressive with fish when straying from their territory. They will aggressively attack other fish while you are feeding them. All tank mates should have more space within a larger tank.

How do I keep a black shark happy in my tank?

The Red Tail Black Shark is a fish that belongs to the Cyprinidae family. This family is native to Thailand but is considered extinct in the wild. Famous for its large dark body and a vivid red tail, the fish can grow to about 6-inch in length. A lifespan of six to 10 years is expected, but rare reports report that some people live as much as 15 years. If you plan to keep this fish at your aquarium, be sure the tankmates you chose could stand up to that type of aggressive behavior.

Water parameters

Water parameters are one part of the Red Tail Sharkcare we shouldn’t get crazy about. Even though this isn’t the most sensitive species globally, you should constantly check the water parameters. Checking the water prevents anything from pollutants in the water to pH drops. Get an aquarium kit test and inspect your tank and tap water.

Tank conditions

It would be best to guarantee juveniles have a tank of at least 29 gallons, and adults have 55+ gallons. You may also try to ornament the tank to reduce territorial behavior and help protect more timid tank mates. For the water flow, you should try to ensure water is slow-flowing to match the natural environment. The substrate must include gravel and pebbles, or fine sand. Remember that they can be jumpers, and therefore you should use a heavier lid.

Habitat and tank requirements

During the rainy season in the natural habitat, these black sharks live in the flooded streams and forests. Over the recent decades, the wild population of Red Tails has been virtually gone because of excessive poaching and changes in landscapes caused by population growth. But booming aquaculture business means that this species is still alive. It is now listed as critically endangered.

Take care

The Red Tail Sharks are pretty simple and easy to care about since you know how basic they are. They’re pretty sturdy and withstand a decent number of water parameters. But if you have one in an adequate tank, you will experience a problem. Learn all of your basics to get started on the right path. Red Tail Sharks are pretty simple to keep as well as can be held under normal water circumstances. They are easier to maintain in massive systems.

Tank Size

The recommended tank is 75 gallons. Even though they are not monsters, the fish are very active and require a lot of space for their swim. As semi-aggressive species, the area helps reduce the possibility of aggressiveness toward others community freshwater fish. It is highly recommended to increase the size of your tank significantly if you want to try to keep two of them in the same tank. To get more information, follow this article.

Tank requirements

Moderate water flow is needed to recreate the natural habitat for the red tail black shark. For the substrate, use gravel, fine sand, or big rocks. Live plants add value to aquariums. They might eat algae in stones and glass, but they leave plants unharmed. Putting a thick layer of gravel as a substrate can be helpful.

Life span

The Average Red Tail Species life span is five to eight years. There might be ways you can help them live happily for the rest of their lives. Buy fish from a reputable seller and breeder. Keep these in an excellent habitat at all times. Keep the fish in an environment suitable for it, provide good quality water and the perfect parameters for the species, and an optimal diet, so your fish will live to the full, always in its splendor. Reduce stress by keeping them with suitable tankmates. We also will cover other issues to keep them healthy in a safe environment and a happy place.

What to put in their tank

The ideal substrate for the red-tailed shark is moderate-sized gravel or pebbles. Many owners say they found their Red tail Shark hiding at plants instead of caves. Some driftwood is a good inclusion that gives variety and places where the fish can hide. Make some open space to swimming in the tank. It can be easy to go overboard as you decorate the tank. This species prefers to inhabit the bottom of the aquarium, which is why choosing the correct substrate is so essential. The fish comes from a large basin in central Thailand whose surface is filled with vegetation, driftwood, and stones. Knowing their natural habitat means you’ll use these items for your fish to get more comfortable at home.

Red Tail Shark Diet and Feeding

Red Tail Shark

Red Tail Sharks are omnivorous, prone to herbivory, and in the wild, the food it consumes will consist of insects, larvae, crustaceans, algae, and small insects. They are also scavengers and will eat much of anything put in their aquarium, including fish pellets, fish flakes, and live and frozen vegetables. The core of their diet should consist of an excellent value pellet or flake. It would be possible to add variety to it by using it with animal and plant origin ingredients. If you feed, them vegetables wash them first. Usually, there’s a considerable number of vegetables they accept well, like broccoli, zucchini, and carrots.

Food and Diet Recommendations

The Red Tail Shark are omnivores who are not picky about things they eat. It eats plants, insects including crustaceans, in its natural habitat. Brine shrimp, bloodworms, or tubifex can be a few of their favorite foods. Some aquarists also suggest including vegetables such as zucchini or cucumber in their diet. After feeding, remove any leftover food from the tank; leftover foods are likely to reduce water quality and rapidly increase the potential for illness.

Compatibility and Tankmates

RedTail has a reputation for sometimes dangerous and aggressive fish. The shark is a territorial fish that will get hostile to other fish if it invades its territory or during feeding activities. Although Red Tail isn’t exactly a suitable candidate for a community tank, you can still have it with other fish. Ideal tankmates must also be solid and fast and spend much of their time in water’s middle and upper levels. Other sharks such as rainbow or blue-tailed are to be avoided. In addition, it is advised not to go for other bottom dwellers like some Cichlids and Plecos.

Red Tail Shark Tank Mates

Since they often get aggressive, you must find the right tankmate for it. Fish who are curious and bold are unfit for them. The possibility of keeping more than one Red Tail Shrimp in one aquarium comes at a cost; Due to their territorial nature, there is a very high probability that these fish will fight if they don’t have a substantial area to explore and hide. For this reason, it is good to have a few hideouts.

Keep Red Tail Sharks with other Red Tail Sharks

For each Red Tail, you add one meter or 20 gallons into the tank is required. You must also keep at least five sharks at the same time. Keeping it in a group prevents the “alpha” from brutally killing each fish. For the most avid fish fan, a huge tank is utopic, hence why we recommend keeping only one individual. This does not mean that we need to keep it in tiny spaces. If you insist on house more than one shark in your aquarium, then do it with caution. Make sure the aquarium is large; Redtail Sharks are exceptionally territorial.


There are few reports of successfully breeding Red Tail Sharks in-home aquariums. Artificial breeding techniques are harmful to your fish and can be detrimental. It is best not to try breeding them. We never encourage aquarists to try unless there is a clear path to success, so there’ll be no space-occupying this section. In contrast, the entire world population is obtained from farms. Aquaculture uses manuals and techniques for inducing reproduction, and it also does so naturally, ensuring the species’ prosperity, even if it is practically extinct.

Red Tail Shark Breeding

It’s hardly an example of someone who has produced Red Taileds in an aquarium. It can most likely be a result of luck. They’re extinct in the wild, and the commercial breeding system is left to keep them out of extinction. In many commercial environments, hormones are used to induce mating. As fry develop, they can switch color from silver to brown before dark. At about ten weeks old, their red tail begins to grow. After a male fertilizes the egg, it takes 40-60 hours to hatch the fry. It usually spawns in rock caves.

Disease Potential

Red Tail Black Sharks don’t have a species-specific disease, but they can develop other common freshwater diseases. The likelihood of such an event goes down significantly if you provide them with great care and perfect water conditions. We recommend that you focus your efforts on avoiding problems keeping a maintenance schedule instead of treating it. If your fish is unlucky enough to get sick, you need to find out what disease is affecting them and quickly come up with a solution. Till then, feed your Red Tail Shark a good source of quality food and provide your fish with suitable habitat and water conditions. You also could spend minutes inspecting the water and the fish behavior every day.

Where can I find a Red Tail Black Shark?

Your local fish store may have enough of these fish to supply for everyone. Take your time to choose the right fish from the tank store. Bright eyes and colors, correct and constant movements, and no visible parasites are signs to look for. If the fish is feeling stressed, strange, or looking, you must give up the purchase and go to other stores; all of the tanks should be visibly clean, and the fishes healthy, look for fallen or lying fish, as well as dead fish in hard-to-reach places. A tiny alga on the walls doesn’t mean anything, but dirt on the substrate is a red light. If you come across this type of treatment or carelessness in a fish shop, talk to the responsible and file your complaint. They will be happy to hear candid feedback from their customers and turn the situation around. You should inspect all tanks to ensure cleanliness and safety to purchase. You can also order it on the internet, on specialized online shops.


Red Tail Sharks are beautiful freshwater fish and will continue to be popular in the aquarium for quite some time. Their simple design and attractive appeal make them a good choice for broad-ranging experience levels. The only semi-tricky part of owning one is dealing with their aggressiveness (and this should be only important if you plan on keeping them in a community tank). We hope this guide helps you to understand the care of Redtail Shark.

The Complete Ember Tetra Care Guide

Ember Tetra

The Ember Tetra, also known as the Fire Tetra, is called that way because of its beautiful orange scales. These playful little tetras are very active and come as a friendly companion to countless other tropical aquarium fish. Continue reading to find out everything you need about these little fish…

About Ember Tetras

The Ember Tetra (Hyphessobryconamandae) is a tiny Orange tetra of South America. They are in the Characid family, one of the most diverse fish families in the world. These fish can be found around the Araguaia River basin in Brazil. They are unusually hardy for their size, and they are not especially susceptible to popular fish diseases. It would be best if you kept Ember in shoals of at least eight individuals. If you love community nano tanks, then you’ll love these tetras.


Hyphessobryconsamandae is popularly known as the Ember Tetra. This species was recently found in 1987 and given Amanda Bleher, who was the mother of Heiko Bleher, the one who found the fish.

Ember Tetra

What does Ember Tetras look like?

Ember Tetras have a red or orange tone similar in appearance to fire’s dying embers. They have elongated bodies, one anal fin which is merged, two small dorsal fins in one. The body almost always has a bright orange color, with the lower body slightly lighter than the top. The females usually have larger air bladders than the males, but their bodies tend to be smooth during breeding time. If we want our Tetras to turn a deep red color, we would have to take special care of their diet, give them live feed, and take extra care of water pH levels and soil conditions.


The Ember Tetra is almost entirely Orangeish-red, and its color brightness is present wherever on its body. Their distal fins are thick and tall, with a gradient that fades from their primary color to an even shader backward and back. Their caudal fins with forks have more drastic color transitions than their dorsal fins. Their bodies have a classic shape seen in most tetras. The nutritional levels of the diet will impact how vivid their color is. A dull Ember Tetra usually suggests it’s not taken care of properly at some point. The fish are adorable and bright color creatures.


An average Ember Tetra size is around 1 inch long. It is somewhat smaller than some other tetras, as neons. Some people think these creatures are identical, just differently colored just as much. The size of these fish is usually not impacted by the high quality of their care. There are cases when a fish grows longer than an inch, but it’s very uncommon.


Ember Tetra is named for its warm orange body that glows almost like a glow in an aquarium. Males usually show darker to brighter coloration, especially during spawning season. The Ember Tetra can not be confused with the glowlight tetra (Hemigrammuserythrozonus).

Ember Tetra: a species profile

The Ember Tetra (Hyphessobrycon Amanda) originated from Brazil’s Araguaia basin and was discovered in 1987. Growing to a maximum of 0.8 inches (2 cm), This fish is a popular choice of home aquariums because of its small size, attractive colors, and easy maintenance. Today’s article talks about embers tetra and describes why they are a popular aquarium choice. And we also talk about easy-to-care fish status and why we consider them the popular alternative to make our aquarium.

Summary of species

Ember Tetras (Hyphessobryconamandae) can be found most strongly in southeastern Brazil in the Araguaia River basin. They prefer the waters of rivers that have small currents and an immense concentration of vegetation. In the wild, this fish eats plant compounds and tiny invertebrates. They are surprisingly calm and can be compatible with a wide variety of tankmates. The primary color of the Ember Tetra is the vivid orange hue. This makes them stand out in most freshwater nano aquariums and means that this fish is likely a popular choice for years to come. This fish might most likely be popular in the Freshwater nano aquariums.

Is the Ember Tetra suitable for your aquarium?

The Ember Tetra‘s a stunning fish that fills any aquarium. His temperament makes this a superb choice for anyone who has a community tank. These beautiful fish seem so friendly to have and look great in groups. This article will help you discover everything you can about this fun tiny fish. It’s also an excellent way to get creative with the tank set up with the tropical fish in your tank.

Are Ember Tetras Suitable for Aquarium?

Ember Tetra is one of the most typical tropical fishes in tropical freshwater aquariums. Bright colors and unusual appearance have been popular for the community tanks. The only thing to bear in mind is their size and responsiveness to water parameters. Its peaceful nature allows the fish to fit easily into almost any aquarium. It’s also a perfect opportunity for testing a Nano setup in a 10-gallon tank.


Floating plant species and driftwood branches, and dried leaf litter are valuable additions to the tank. Microorganisms find in those decorations may contribute useful secondary food sources to fry. Filtration has to be correctly sized and with moderate water flow. The tannins and other chemicals released by the dead leaves may be beneficial.

Natural habitat

The Ember Tetra is common in slow-moving rivers in the western parts of Brazil. In the aquarium, to mimic their natural habitat, it is commonly recommended to keep them to a slightly acidic water level with a pH of around 5.8 to 7. They live in hot regions. The ideal temperatures would be between 75 and 82 F or between 24-28 degrees Celsius.


Das Mortes river is a large tributary of the Araguaia, the primary outlet of the Rio Tocantins within the lower Amazon. The full range of H. amandae in the system remains elusive.

Wild habitat and tank conditions

These fish come from the waters of the South American rivers. Underwater vegetation can be found in abundance in the river and provide the fish with protection. Most of the time, Ember Tetras remain in the low flow zones of the river basin. They usually come out just after sunrise and just after sunset and stay in the central areas of the water columns. These rivers have a muddy substrate with many dead leaves and driftwood.

How do I care for Ember Tetras?

Ember Tetra is a small freshwater fish which are prone to no specific illnesses. Overfeeding sometimes can be a problem. It could cause numerous diseases in their digestive system. Keeping up with water changes and checking the parameters is fundamental for health, as is consistently conserving the water tank quality.

Ember Tetra Care

Ember Tetra

Ember Tetra fish are perfect for keeping and recommended to aquarists of any professional level. As long as you take care of the basics with their habitats and the water quality, there’s nothing you have to worry about. This is why we recommend them for anyone seeking some vibrant color for their tank. These tiny fish are quick and easy to keep.

Ember Tetra Care Guide

Ember Tetras are one of the easiest fish for beginners to keep. The species is quite strong and healthy for its size. Make a good maintenance schedule and keep your water supply constant. The fish is not particularly prone to disease only picks up parasites that cause discomfort in the fish tank after its treatment. If the fish looks very dull or consists of mixed vivid and soft colors, this indicator may mean it is unhappy with its tank conditions. Unfortunately, they don’t live long. You can expect them to stay alive for two or four years (even under the most effective care).

How long do Ember Tetras live?

Average tetra survives between one and four years. You can prolong their life span by up to a year if you properly care for your fish. Tetras living in large tanks tend to live longer than those living in scarce tanks. If you can keep your tetras happy, they may live up to six years if even more attention is paid to their habitats. Assure that you put lots of live plants inside the tank, maintain your water well clean and feed them the proper amounts of live food.

What do Ember Tetras eat?

Ember Tetras are micro predators and need a regular food supply of animal-origin food. They have tiny mouths and are not interested in seeking food that splatters in their bottoms. Feeding the tetras may take the most challenging part of keeping them, and you need to make the most effective care they can handle. Try to keep their diet as diverse as possible, so your Tetras will be happy and healthy. Possibly you’ll want to look for feeding worms, baby brine shrimps, Baby daphnia, grindal worms, or whatever. In addition to offering a quality commercial feed. Make sure you provide a little bit of everything for your fish; variety is the way to go.

Ember tetra diet

Ember Tetras will accept fish flakes easily; however, other well-balanced and nutritious foods should serve as a foundation for their diet. Frozen, fresh, dried, and live foods should be supplied often to maintain your tetra shining brightly. It is essential to remember that these fish are tiny and are probably more challenging to eat. If necessary, it’s recommendable to break up tiny pieces, so it gets easier for them to eat. Ember Tetra is a hardy fish and eats practically anything they get.

How big do Ember Tetras get?

Amber tetras are relatively tiny at a maximum length of 1 inch. Due to their small size, you can place a considerable number of these in minor fish tanks.

Ember tetra tank requirements

The recommended tank size for a school of Ember Tetras is 10 gallons (38 L). It aims to replicate their natural habitat. An Indian almond leaf is used to darken the water because tannins are released from the leaves. These fish perform best in lower water flow. They can’t quickly go around when idle in the water column. It is also worth considering how tiny these fish is and that the water pump can soon suck them up if they have no protective barrier.

Tank Setup

The fish originates from small rivers where the flow slows. It can be very beneficial to make use of a powerhead or for filtration. Because they prefer slightly acid waters, the fish usually has a pH range between 5.8-6.8. Some driftwood or leaves will help decrease the pH. It should be at least 10-gallon tanks capable of storing 5-8 fish.


In addition to providing shelter and a microenvironment that generates food, living plants help in gas exchange and nutrient cycling in the aquarium. Due to the skittish nature of these tetras, they often weave through hiding areas during the day for safety.

Ember Tetra Tank Mates

Because of this gentle nature, several viable tankmates are available for the Ember Tetra that are worth keeping. Cory catfish, rasboras, Neon Tetra, and pygmy catfish are all commonly paired. Essential, all kinds of nonaggressive fish will fit it! If you follow the recommended guidelines of temperament and size, there’s an unlimited supply of choices available. We even have critters like snails and shrimps for tanks with Ember Tetra. We don’t recommend tankmates large enough to eat the Ember Tetra because the tankmate might accidentally confuse them with a snack.

Tank Mates for Ember Tetras

Ember Tetra

Ember Tetras can survive peacefully with almost any other sort of tetra. Neon Tetras also make good tankmates, as do Pygmy Rasbora. Small Corydoras Catfish are also an excellent addition to our Ember communities. Cichlids Oscars or even more peaceful Freshwater Angel Fish would make tetra tanks a nightmare. Long-tailed fish (like the Gouramis) can also be avoided. Barbs such as Tiger barb may be too much for this fish to manage.

Ember tetra behavior

The Ember Tetra is a school fish that thrives when kept in when held in many individuals. They move in clusters and wade in the middle and upper parts of the aquarium.


These Ember Tetras are skittish because of their small size and fragile demeanor. It is usual for them to desire safety from predators. These tetras should be kept in a shoal of at least 5-8 fish. They’re also easily stressed and should be maintained with fish of the same size and distribution. They look magnificent in a community tank as they appear dazzling as groups with another fish in the aquarium. This species thrives in planted tanks and thrives in any tank given their hiding zones adequate to withstand water. Several times these tetras are observed to weave through plants and decorative items during the day.


Ember Tetras are free spawning fish which means parents don’t care for the fry. Under well-monitored conditions, spawning is frequently performed and does not require additional assistance. To stimulate spawning, try changing pH near neutral and making water temperature around 80-82°F. If the parents are eating the fries, they should be placed in separate tanks. It is recommended to optimize the acclimatization procedure for all fish, including the parents. Illumination ought to be dimmed.

Breeding & Reproduction

Ember Tetras are one of the easiest species for breeding. You can just put both males and females together in a tank to help to spawn. When a Tetra spawns, you will see behavior changes. The male will chase the pregnant female around the tank and become aggressive. You may need to install small breeding tanks with low light and filters. Ideally, it’s imperative to keep the water filtered for the proper breeding and birth of eggs healthily. Once tetras begin to lay eggs, it leaves them, leaving them to fend for themselves. Once they reach a medium size, you can bring them into a regular fish tank.


Amandais eggs spread-free spawn animal showing no parental care. Young adults can spawn often; in mature aquariums, small numbers of small fry can appear without intervention. If you desire to maximize yield, this means that you’d need a much more controlled approach. Adult groups can still be conditioned together, but a smaller aquarium should also be set up and have a mature filter system. The water itself should have a slightly acidic to neutral pH with a temperature towards the upper end of the range suggested above. The sponge-filter or air-stone s could also add oxygen and fluid filtration.

Sexual dimorphism

Adult males are more intensely colored, especially at the breeding stage, while females are noticeably more round-shaped.

Caring for Ember Tetra Fry

You must watch the breeding parent several weeks before she spawns, or it could end up eating the fry. Please take care to feed pregnant mothers live feed at least two weeks to trigger the spawn.

Ember Tetra Facts & Overview

This Ember Tetra is a small freshwater tropical fish of the Characidae family. These fish are very popular with fish keepers because of their beautiful appearance and not demanding fish. Their bright, fiery appearance makes them relatively easy for us to keep in our tanks. They are active but peaceful fish; great choices for anybody with any level of experience in fishkeeping.

Feeding and general husbandry

Tetra embers are voracious eaters in the wild. Almost all their food in their natural habitat consists of worms, invertebrates, and phytoplankton. They can happily feed on almost everything from an aquarium. It’s recommended that you vary their diet with some form of wet food like live or frozen daphnia or tubifex worms. This is important because too many processed foods such as flakes and pellets cause digestive issues. Because of its small size, this species is a susceptible fish. It is best only to introduce them when the tank is completely cycled.


Combining their beauty and ease of maintenance make them ideal for aquarium keepers of any experience level. The lightning colors and splashing in the waters are worth it. Whether you are just starting to fish or want a nice and low-maintenance fish, the Ember Tetra can be an excellent choice. We’ve already recommended them to friends for years, but now we’ll let you know how good they are!

The Ultimate Guide to Black Moor Goldfish Care

Black Moor Goldfish

Goldfish are famous because of their unique appearance. They have a bold color and intriguing anatomy, which makes them surprisingly exquisite for home aquariums. They offer a calm temperament that should cause no trouble to the rest of the fish. They’ll always be easily kept if the tank is clean and has good nutrition, making them ideal for a starting fish. This article should help you know all the best ways to care about your own Black Moor Goldfish. It gives you tips for keeping the fish in your home aquarium.

Black Moor Goldfish are very easy to keep and maintain. Named after the beautiful black color they display, this species is a peaceful type of Goldfish that is extremely easy to feed and has excellent maintenance rewards. What distinguishes the black moor from other fancy goldfish types is primarily its characteristic ‘dragon’ eyes. As one of the telescope goldfish, these fish have big prominent eyes and a comical bulging appearance.

Black Moor Goldfish: the most stunning of the dragon eyes

Black Moors have a round body and large flowing fins. This type of eyes is a big draw for aquarists. The bulging eyes caused by increased intraocular pressure are commonly called the dragon eyes. Similar to all telescopes, Goldfish the eyes grow in diameter and provide low-angle sight. The fish will grow well if you have an aquarium in good conditions. They are manageable for any aquarist- even beginners. In general, black moors need no special needs, be a perfect fish in any home aquarium.

Black Moor Goldfish

Caring for Black Moors in an Aquarium

Black Moor is a kind of Goldfish that has a particular feature. Growing to 6-8″ in length as adults. They are capable of living for as much as 20 years. Some have around, stubby and surprisingly “cute” bodies- far less than those of a standard goldfish’s sleek, streamlined outline. It also has fancy flowing fins and almost always has the Black color, as the name suggests. They’re uniquely exciting fish to have incorporated into pets. They are sometimes alternately nicknamed the goldfish “telescopes” because of their prominent eyes.


The Black Moor Goldfish Carassius auratus are slow swimmers because of the curved shape of their bodies. The younger fish will have fewer dark colors; with age, that will eventually turn darker. Goldfish males are more significant than females. Sexing this particular Goldfish is quite tricky as the difference are not so obvious. It can be easier to tell the different species during the breeding period since the males have what’s known as the breeding tubercles on the fins. They appear like white bumps that are quite visible.

Origins of the Black Moor Goldfish

Black Moor Goldfish

The Black Moor is a type of Goldfish with telescope eyes and black colorations. The species had been selectively raised for these traits. Early forms of Goldfish were introduced in Japan in the 1500s. Once in Japan, fish breeds further improved the long tail fins and bright color designs. The famous Goldfish can be spotted all around the world. Early fish keepers isolated the fish in their pools as fascinating oddities.


The Black Moor Goldfish has dark metallic black scales and telescope eyes. They are very hardy and will eat practically everything they are fed with. Like most Goldfish, The Black Moor will grow quite large and need a large aquarium or a pond when fully grown. Goldfish can eat all the introduced plants at once. Do make particular food that contains food derived from vegetables.

The Ultimate Guide to Black Moor Goldfish Care (2021 Update)

Black Moor Goldfish is unique among its species. The whole body, including eyes and fins, is black. This complete Black Moor Goldfish Guide is here to provide more information as to who wants best manage the Goldfish in your Black Moor. The guide will additionally show you how to care for your beloved Black Moor fish and how to keep them healthy.

Care Sheet: Black Moor Goldfish | Carassius auratus variety

In contrast to common Goldfish, Black Moor Goldfish may be more dramatic and beautiful. These Goldfish can be peaceful and require much more care than most goldfish species. Keep reading to know all the things you should know about the conservation of this fish in your aquarium. Have you ever saw any black goldfish?

Types of Black Moor Goldfish

Black Moor Goldfish

This Blackmoor has the same traditional short but eggs-shaped body. The eyes come out of the side of the head like other varieties of telescopes. The original Black Moor has a fantail, but most modern types have shorter flowing fins. Some fish eyes shine like smooth cones, while others seem crannies or balloon-like. Black Oranda Goldfish, Black Lionhead Goldfish, and Black Ranchu Goldfish all had normal eyes. Recent breeding projects produce a variety of fancy black Goldfish, including Black Ryukin goldfish. Black comet Goldfish can be called Black Bubble Eye goldfish also!

Origins and Habitat

The Black Moor Goldfish results from selective fish breeding from China and Japan used to receive and retain its defining genetic abnormality – telescope eyes. This was achieved by confining such fish eyes into just a single pond giving rise to dozens of smaller spawns. This unique black color and long body fins were then fixed into permanence.


The blackmoor goldfish is relatively easy to identify among other species of Goldfish. Black moors can reach 6-8 inches (15-20 cm). They will also grow very round and take on an egg-like shape which slows their movements through the water. Their big bulging eyes also mean they have poor eyesight, but eye infections are generally rare. They are nearly entirely black, but some may have some orange or gold on their bellies, but usually, these fish are mostly very black.

Color development in Black Moor goldfish

When the Black Moor fish is small, they frequently tend to have a brownish bronze appearance. As fish matures, they will gradually begin to develop their velvet-sharp colored and protruding eyes. Some professional breeders claim that hot water reduces the fixation of black pigment on Goldfish, causing them to turn into Bronze flakes instead. Genetic and age may also play a role in reducing the black in older fish. Even mature fish can lose black coloration if maintained in warm aquarium water. Let us talk about water quality topics later!

Look & Varieties

Blackmoor goldfish are slimmer bodied than the shorter and stockier females. Occasionally they show an attractive flowing black tripod tail, typically longer on females. Black is an unstable color variation amongst Goldfish. If you don’t buy your Goldfish from a quality breeder, there is no guarantee your Black Moor color will remain stable forever. As they mature, their black pigmenting develops, but unfortunately, old age and water temperature can make them fade. As the fish get older, they start to lose coloration and sometimes even developing a white belly

Black Moor Goldfish Habitat and Tank Conditions

Goldfish are domesticated and selectively bred, meaning they don’t exist in a natural habitat. Asiatic carps live in murky freshwater water lakes, rivers, canaries, or reservoirs. This environment needs a proper home environment for Black Moors to flourish and to stay active. The pH would be relatively neutral to alkaline, and the temperature range should be broad, with significant variations throughout the year. The water is slow-moving, and the substrate is covered in sand.

Are Black Moor Goldfish Suitable for your aquarium?

People of every level of experience will be capable of keeping theBlack Moor Goldfish. His diet must be healthy, and we do this to avoid any stomach upset. If they’re in a community aquarium, they’re likely to need a peaceful tank mate. Goldfish are graceful swimming in the tank water, and it is fun watching.

How big are black Goldfish?

An average black moor is 6 inches. At their biggest, they can stand 8 inches.

Black Moor Aquariums

Most believe that Black Moors are affected by poor eyesight. They have a smooth body and long fins, meaning they typically swim slower than other species. They’re not suitable for ponds where they can struggle for the chance to compete with other fish. Because of their slow movements, they can be prey for cats and other animals. Some aquarists suggest a tank with a volume capacity of no less than 100 gallons. They can also be stored in a tropical tank in water up to 25c. Sudden fluctuations in water temperature can cause many problems for the fish. Therefore you should never place aquariums in direct sunlight where water temperatures may suddenly arise.

Aquascaping a black moor goldfish aquarium

All Goldfish are notorious diggers. If dirt or sand is small enough, they can scan it to find the food. Keep no food in the gravel bed. It will simply decay and cause water quality problems such as cloudy water algae growth and nitrite spikes. Larger smooth stones can be arranged around plant bases so that they won’t cause digging there. The fish might explore caves and other ornaments in the tank; they are curious animals. Don’t use sharp pointy objects; telescopes and bubble eye goldfish can get hurt in this type of decoration.

Blackmoor tank requirements

The black moor makes wastes very much and can very quickly pollute up the tank water. For this type of Goldfish, the recommended minimum tanks are 100 gallons (380L). Since these fish don’t swim as well as a great swimmer, it’s recommended to have a large fish tank instead of tiny shoal fishes. If you want to add plants in your tank, either fake or real, make sure to place them at the back and prune them so that the open swimming area is free for your fish.

How do I set up my fish tank for Black Moor Goldfish?

Black moors have poor eyesight, and they often take up anything they find. The optimal shape for the tanks is longer rather than high and therefore allows more swimming space. Size the biological filtration correctly concerning the inhabitants and size of the aquarium. Keep your maintenance organized and keep the water flow low.

Aquarium Filters for Black Moors

There are numerous types and models on the market; ask the seller for help to understand which best fits your system. Internal canister filters are probably the most straightforward and most economical kind of filter for Goldfish. Clean up the filters and substrate, and proceed with a water change each week. Even with filters, it’s essential to change the water regularly.

Maintenance and care

Cleaning the tank regularly, always take off food left in the water; this way, you can keep the conditions cleaner for longer. Change the water every week or so. Try not to put anything that could hurt the fish when designing the tank. Make every attempt to spot unusual behaviors from your fish. These are signs that you can get from a severe disease of the fish. After verifying that your Blackmoor goldfish is sick, take suitable measures to isolate it from the main tank. Goldfish care is not complex as these are considered beginner fish and can keep you company for years.

Temperament and behavior

Black Moors are slow swimmers that do not need much to entertain their keeper. When they keep fish of similar temperaments, they prefer being with their species. They mostly live along the middle part of the water column but often hide under plants, close to the substrate, or in-tank decorations. The BLACK moors preferred to be on their own and will shoals when they could. They’ve often hidden in someplace in the tank when attacked or overwhelmed by other fish.

Care Level

The Black Moor Goldfish is easy to care for. They do not require anything special for survival, and they can be in your presence for quite a long time. They only need a lot of space. Dermatitis and swimming bladder disorder are specific diseases in Goldfish, so make sure you take care of them each day. A clean environment is necessary to keep the fish healthy, and once you find a sick fish, keep it away from the rest in the same individual tank.

What to feed your black moor goldfish

Goldfish are hypersensitive to swimming bladder disorder. Having a proper diet is essential throughout their life but is most important at their early development stages as younger than two years. Goldfish will require a balanced diet consisting of good quality protein and vegetable matter and sinking pellets, flakes, or gel foods high in protein and fiber. Healthy vegetable treats such as beans should be available sometimes as store-bought products should not be the prime source of nutritional content. It is possible to reduce the protein percentage as young adults develop, but high fiber and protein should remain consistent for maximum digestion. The fiber levels should be uniform.

Blackmoor diet

Similar to any goldfish, black moors are omnivore fish, with a tendency to be herbivores. So, to ensure an adequate diet for your fish, you need to include plants and animal-origin feds. Fish flakes should also contain frozen foods like worms, shrimp, daphnia, and tubifex worms. Round-bodied Goldfish are highly susceptible to swimming bladder issues, and good nutrition can help prevent digestive problems. When frozen and dry foods are consumed, they should always be soaked into tank water before being offered. This aids your animals in digesting it and can stop them from suffering constipation.

Diet and feeding

Green vegetables are good for support the digestive system. Lettuce, spinach, and broccoli are some examples that work well. Feed Black Moor Goldfish as often as you can, but in small amounts. Only add small amounts of food they can quickly finish in minutes. The fact that the intestinal tract handles fewer meals at a time makes the process of food handling easy to master. Black Moors are omnivores but eat both meat and plant foods. They would probably eat anything they could find—a tiny insect, including tadpoles larvae and small bits of broken vegetation.

What do Black Moor Goldfish Carassius Auratus eat?

Most goldfish varieties are omnivorous fish which means they can eat animal meat and plant varieties for various purposes. Dry pellets and flakes are usually used for feeding a black moor. You have to provide them a variety of food. Unique frozen products are highly recommended because they offer the best nutrition value you can get in the hobby. The nutrient content helps to draw out faster the black coloration of fish. Make sure to rinse the veggies well first before offering them as food.


Black moors are big eaters who mistake whatever it is with food. Flakes and pellets are usually used on this Goldfish. Look for bloodworms as well as other moist or frozen foods which are easy to digest. Beware of food leftovers in the aquarium, which will pollute the water.

Tankmates for Black Moor Goldfish

Black Moors move slowly with their long eyes, so they can not get as quickly into food as other goldfish species do. A small number of goldfish species can be somewhat aggressive and have a ‘butt head’ to compete for food. Goldfish with a similar temperament should not be allowed to go into one aquarium. Suggested companions are also telescope or bubble vision kinds. Most aquarists like to keep at least two Black Moorors together as a single kind of fancy goldfish fish tank. Black Moors are pretty hardy, but not all fancy Goldfish make for good roomies in aquariums.

What is a good tankmate for Black Moor Goldfish?

Blackmoor goldfish Carassius auratus are delicate and peaceful. Their favored companions should share such aspects. Choosing a suitable tank mate is vital to prevent your fish from getting stressed or hurt. This includes the squirting of the fins and can damage their eyes, which injures them easily. It is also an essential aspect of black moor fish – care as it prevents them from being threatened.

Black Moor Goldfish tank mate

Black Moors are calm, fragile, and slow-swimmers; thus, any tankmates have similar traits. They also make a perfect companion. Keep out aggressive predator animals such as Oscars. Invertebrates are peaceful and can be kept together. Shrimp and snails now appear commonly across aquariums. Examples of such include the Amano Shrimp, Ghost Shrimp, and Mystery Snails, and Nerite Snails. It is also possible to have numerous fish in the lower portions of the aquarium, such as the Bristlenose plecos and Kuhli-loaches.

Black Moor Goldfish in communities

Blackmoor goldfish have the most fun in school. The animals can tolerate water temperatures well and mix with community aprons without problems or even tropical tank types.

Are Black Moors good tankmates?

Black Moors are prone to form good friends when housed and kept appropriately. Unfortunately, they don’t make good community tanks mates with several different kinds of fish. They should ideally be kept with other slow-moving similar-size fancy Goldfish in appropriately decorated and maintained tanks. Keep them relatively equal in size and slow-moving so as not to bully anyone. Make sure to get enough swimming space for every fish in the tank.


In the wild, the spawning season is usually in spring, so all it takes is making sure your condition mimics that of the wild. The females lay their eggs on roots and mops, so ensure there should be plenty of this type of spawn substrate. On average, each pair can hatch 10,000 eggs – and that could occur within two days. When the larvae hatch, feed them a packed diet for the first two months. Eventually, you can re-inject them to parents and offer them similar food. You know the magic will begin when you see your precious Goldfish flying around each other.

Breeding black moors

Like all goldfish varieties, black moor begins laying eggs when water temperatures rise. The female Blackmoor lays her eggs, and then the male fertilizes them. Spawning could take several hours, and a female fish can lay over 10000 eggs at a time. About a week after they hatch their egg, the fry can freely swim. They feed small, high iron, and high protein foods until fry becomes big enough to eat similar foods to their parents. Once that period (approx two months) is over, you should be able to place these in your pond.

Breeding your Black Moor Goldfish: For Fun and Profit

You’re going to want to have a separate breeding room on-site to prevent the mothers from eating the fry. However, otherwise, this doesn’t have to be hard for fish to spawn. It’s straightforward for Blackmoor fish to breed with an adult male and female.

Keep your Black Moor Goldfish Healthy

It’s effortless to keep the Black Moor healthy, especially if you know the information above.

Life span

Some aquarists have even managed to keep the unique microscope for 20 years. If you have the correct size of your tank and a good diet, they can keep them going. Black moors could last up to 20 years.

How long does Black Moor Goldfish live?

Like other goldfish types, black moors have a life span of up to 18 years. However, if you keep supplying superior water quality and meticulously keep the proper condition for your fish, you could even see them live more than 20 years.

Hardiness and Diseases

The black moor has a solid and determined disposition. If you maintain your water parameters stable and the water quality, this species won’t develop any trouble. They look delicate at once, though. Sometimes they can tagle in your aquarium net or end up hit by an object. They can also suffer from a urinary system infection. Sometimes it can happen to your black moors to be debilitated by velvet diseases. Please be careful whenever you notice spots or change the color; this is tricky because this change of color is natural and forms part of the species’ growth, and can indicate a disease.

Take care

You should have no trouble with your Goldfish. Because they are delicate, they may need more attention than other types of goldfish. All their organs are squashed in their small body and can increase their chances of illness. Skin diseases like velvet disease are generally the case in Goldfish and are caused by parasites and bacteria. If you see an infected fish, move them to quarantine tanks to prevent this bacteria from growing on other fish. Make sure you watch their eyes while moving. In the case of keeping the tank, clean problems should be less frequent. This includes weekly water changes for maintaining excellent water quality.

Black Moor Goldfish Overview

The Black Moors are renowned amongst goldfish owners for their calm, undisturbed nature. When appropriately kept and cared they will be very friendly with any slow-moving or fancy goldfish. Because of their protruding and prominent eyes – as well as their tight build and flowing tripod tails – they have difficulty moving around their aquarium and are not suitable for shallow ponds with rapidly moving waters. Some outdoor ponds put them in continuous stress to compete for essential resources and risk being bullied by incompatible tankmates. Black Moor Goldfish adore safe, smooth decorations and vegetation in their tank.


Blackmoor goldfish are reasonably easy to keep if you have experience with Goldfish. They occupy less room compared to other varieties of Black Moor Goldfish and have a shorter lifecycle. Unlike other Goldfish, a gold moor will produce more waste. As long as you don’t add fish larger than your aquarium and its filter can handle, then the docile and beautiful fish will be the next fish for you soon. If you have more questions regarding black moors’ fish care, don’t hesitate to leave it in the comment section. If you have a black moor in your aquarium, we recommend you consult our articles.

Top 25 Most Aggressive Freshwater Fish For Your Tank (With Pictures)

Top 25 Most Aggressive Freshwater Fish For Your Tank (With Pictures)

Aggressive freshwater species will sometimes have a bad reputation because people did not know much about their fish behavior, requirements, and tank mates. In this article we will tell the least risky approach to keeping agressive species that can cause severe attacks on other fish. Aggression is part of any animal’s life, such as fish. Some animals are more reactive than others; because of this, some fish should be avoided to be kept in community tanks. It should be clear which species exhibits aggressive behavior.

Some Aggressive freshwater aquarium fish

There are some of the most Aggressive Freshwater Fish. Tiger barbs have a penchant for attacking fins and bully passive species. Flowerhorn cichlids are easily identifiable by their color and shape. The most prominent feature of this animal is its nuchal hump that is highly large on male specimens. Bucktooth tetra is an attractive fish that will add much shine to your aquarium. When taken well, in apropriate tank sike, these fish can provide long-term enjoyment to you. With proper care, they can be kept for years without presenting any problems.

Predatory fish

Aggressive Freshwater Fish

Predatory fish are very fierce as they are breathtaking. You will have to make sure you can accommodate their need before you bring some carnivorous predatory fish home. In this guide, I shall list the best Aggressive Freshwater Fish, including several I’ve had (and still do) for nearly decades, and go over the nature of their attention required, like tank size, tank mates, aggressive nature, etc.

Aggressive Aquarium Freshwater Fish

When in the presence of stress, freshwater fish will demonstrate high aggression levels. You must know the essential requirement of the species you want to acquire before placing it in the aquarium. The temperament of the species and compatibility with other fish must be known and have enough tank size for everyone. Keep an eye on the content on this blog to stay on top of all the trends in the world of freshwater aquarium.

Semi aggressive freshwater fish for a tropical aquarium

Semi-Aggressive Freshwater Fish can be easily handled in a small aquarium if you know their needs and limitations.

What is a semi-aggressive fish?

Semi-aggressive tropical fish are not always violent under the right circumstances but may be peaceful under the right circumstances. If you understand these fish before you stock them, you can ensure everyone gets along and lessen the chances of stress and aggression in your aquarium. This article will take an overview of the most common semi-aggressive fish and what makes them dangerous for other fish in your tank. We can never know how a fish will behave. Still, with a reasonably high percentage of success, we can predict how they’ll react in different situations due to their temperament and natural habits. First, determine the variety of species of fish you want to keep in your aquarium.

Big Semi Aggressive Fish

You’ve got to keep all of the fish safe from the big guys. Big fish eats small fish; It’s just a principle. Largemouths and large appetites are labeled as ‘semi-aggressive,’ just as Oscar Fish and many other cichlid fishes.

Factors that affect fish aggression

Not every fish has the same aggression levels. Some animals are more aggressive and vicious than others. Others got to be provoked before they become violent. Other carnivores like Oscar fish can swallow whole fish just because they can. Other are generally common in aquariums that can get aggressive as long as certain conditions are met. Among these factors are the establishment of sexual maturity and reproductive triggers, the requirements of their habitat, and the genetics of the fish. Not all fishes are as aggressive as Oscars. Some are more docile as they are docile and are aggressive as can be provoked by other fish.

Aggressive fish are kept in fish tanks all over the world.

In the aquarium world, people often use predator fish. Temperamental fish tend to be territorial, fight for food, fight in mating and attack other fish. Predators often feed live fish. Even the most Aggressive Freshwater Fish are gorgeously rich in color and contribute to the most effective ecosystem in a proper tank environment. Some fish can be highly aggressive but aren’t prey but behave like prey when it eats live fish and attacks others over food. Sometimes people keep this type of fish with predatory tank mates.

How bad is it to have aggression in your tank?

There’s a difference between Aggressive Freshwater Fish and predatory fish. Often aggressive predator species like to compete with their friends, fighting the food and mates for mating. In contrast, predatory fish will feed upon live fish and invertebrates. Many hostile fish are pretty rich in color, making them the popular choice among aquarists. When they are correctly kept with the right fish, they are easily integrated into a thriving aquarium. If you want to see predatory behavior in its raw form within a tank, please witness the Red Bellied Piranha feeding, viewers discretion advised.

Pressure of mating

In the reproductive period, some species isolate themselves from their groups and become super aggressive and reactive, protecting their partner, their nest, and their litter at all costs. This behavior is more common among cichlids and snakehead species. The abandoned fish generally develop more aggression when being left alone, often setting its former lover aside. These fish tend to become extra aggressive when left behind.


Once a breeding fish has successfully mate, they tend to reduce their territory and gather around their eggs to protect them from other predatory fish in the aquarium. Most fish do not often have eggs but become territorial at the time they mat up. They even become territorial when these eggs hatch.


Aggressive Freshwater Fish might swim around quickly, eat as many fish as possible as well as steal them from mouths and even gills of other fish. Feed a wide variety of floating or sinking food and spread them through your tank with filter outflow or powerheads. To reduce competition, feed a range of floating foods and spread them around your pond.

Charge/Active Attack

One fish attacks the other and head butts or bites it in the head. Sometimes even the risk of an encounter might keep meeker fish hidden for long periods. This behavior is easy to notice.

How can I reduce my aggression?

Fish feeling stressed will result in a tendency toward aggression. Make sure you have the appropriate tanks for the proper chemical and physical levels. If you add extra hiding rooms for these fish, it gives them an adequate refuge from predators. Give fish larger space to live in and dividing them out makes a good solution for halting battles. Change the water consistently to ensure the optimal condition of the water. Tall plants forming a dense forest are a good choice.

Keep your semi-aggressive population happy

If you want to keep this kind of fish in your tropical tank, you must know the potential problems that may arise. Always find out what causes fish to be quite aggressive during life whenever you need to check your tank and perform the necessary tests to find an adequate solution. By making the right choices, you can reduce aggression to a minimum. This article is correct and accurate as far as the author knows. This article does not represent a substitute for diagnosis, prognosis, treatment, a prescription, or an initial consultation from a veterinary practitioner. A veterinarian must immediately see animals whose distress is evident.

Tiger Barbs

Aggressive Freshwater Fish


A single tiger barb will certainly terrorize smaller fishes and may ultimately kill them if they aren’t kept in schools. Because they are omnivorous and devour their own young, you would want to separate them from them during spawning processes. These are different color schemes and should be kept to themselves. There is no apparent reason for aggression, and they enjoy violence. They favor water temperatures between 77-86 Fahrenheit. The most commonly struggle between themselves and bother other fish. The fish are still quite troublesome when kept at school, so it’s better to keep them paired with larger fish instead.

Gourami fishes

Aggressive Freshwater Fish

Gourami Fish is one of the most territorial fish species. They are typically aggressive with smaller fish because of a need to have some degree of hierarchy. Gouramis thrive in slowly-moving streams and have been known to survive under stagnant water. They prefer water with a temperature of 77 Degrees Fahrenheit at pH 6.7. They should have been fed fish flakes but are sometimes aggressive towards their kind. They originate in southeast Asia and thrive in slow-moving creeks. Also, you can try other means of controlling it, like partitioning the tank and adding some ornaments to tanks.


Aggressive Freshwater Fish

Most Cichlids are aggressive, territorial, attack and devour and eat other fish and invertebrates. Some cichlid species are peaceful but become incredibly aggressive in breeding seasons.

Peacock Bass Cichlid

Aggressive Freshwater Fish

The Peacock Bass Cichlid is a South American cichlid employed in South Florida for sport fish catches. Most are covered in iridescent patches that are blue, gold, black, and sometimes green or red. Unlike other fish in the same table, they have a very radical temperament. They are challenging to get used to industrialized feed, and they are sensitive to water parameters. The biggest issue you may face is temperament. If you want to make tankmates, make sure you have fish that can stand out against them. These fish are territorial creatures, so hidden spaces provide them with something to claim as theirs. They get massive and chunky; they need a giant tank.


Aggressive Freshwater Fish

Puffers can be found in warm and temperate parts of the world. They have thick, usually prickly skins and fused teeth. They have a beaklike structure with a split into the center of each jaw region. The largest puffers are about 93 cm (2 feet) long, but many are pretty small. Numerous species are toxic; a highly poisonous substance, tetraodontoxin, is also heavily concentrated inside the organs. Although the substance in puffer might cause death, they are often used as food.

Pea Puffer

Aggressive Freshwater Fish

The pea puffer is one of the smallest fish on Earth. Even with their small size, their attack nature remains. Pea puffers are territorial and can be kept alone. In community aquariums, it will try to bite other fish. The pufferfish is one of the smallest fish on this list.

Jack Dempsey

Aggressive Freshwater Fish

As with most cichlids, Jack Dempsey is intelligent and will interact with its owner but is also quite hostile. A nice looking fish, they do very well alongside other large species that are likewise aggressive. Your Jack Dempsey needs different places to hide, whether it is alone there or with other fish. They are usually not very difficult to care for apart from their apparent aggression; therefore, they do make for a good entrance door for any aquarist who’s searching for the first Aggressive Freshwater Fish. Jacks are famous for their appearance and personalities, but they are also challenging to keep with other species.

Poor man’s Tropheus

Aggressive Freshwater Fish

This species is highly aggressive, and it kills fish larger than itself. Those fishes are not very colorful, but their color varies sharply in reproductive seasons. Some fish maintainers have had success keeping it with other fish, although most prefer to house them in couples or only one specimen. They will get territorial near-certain caves and other decorations, and providing territory for them to defend will diminish this aggressive nature. They are not bad-looking, just not as colorful as the bold options in this list.

African leaf fish

Aggressive Freshwater Fish

Leopard Bush Fish is extraordinarily predatory and will eat anything that fits into their mouth. It would be best not to keep African leaf fish with aggressive species because its peaceful character makes it easy targets. Best tankmates are peaceful fish that are big enough not to be eaten. Bala sharks, red-tail barbs, and silver dollars are generally quiet shoaling fish, are good tank mates, but if they can eat smaller fish, they will. If you have much fish in your tank, then be careful to avoid small fish like neon tetras.

Green Texas Cichlid

Aggressive Freshwater Fish

The Green Texan Cichlid is a knowledgeable fish. All they have is an aggressive attitude and temperament, mainly at the feeding time. Unless you attempt to house the fish with anything with an even higher aggressive level, it will die. These fish enjoy dimly lights, aquariums roots (or decor which mimic roots), floating plants, and caves. One can be kept alone, although often it is to keep one alone with some other cichlids. Keep them at their own pace, and they will interact with you more frequently. A Texas Cichlid who is maintained independently will not accept to add other fish into the tank.

Umber Cichlid

Aggressive Freshwater Fish

Umber Cichlids are a rival to other South American cichlids in color, appearance, aggression, and personality characteristics. Both of these fish have a strong interest in things that happen outside their tank; this shows their high intelligence and being a great advantage when owning either species. If you manage their aggression and other demands, they are not difficult to care for, but a large custom tank or pond would be required long term, but they are worth the investment. They aren’t picky eaters as well. It is an excellent aquarium fish for larger tank size.


Aggressive Freshwater Fish

Arowanas have sleek and slim bodies and high reflectivity scales. There are numerous colors and types of fins; being a fish of high economic value, some colors can reach 100,000$. They are typically associated with luck in certain Asian cultures. According to belief, if the fish owner becomes ill, the fish would suffer the disease to protect their owner by offering new chances of life to them. It moves gracefully through the water’s surface. Most maintainers do not risk their valuable fish in community tanks with tank mates and instead house them alone in large tanks.

Black Wolffish

Aggressive Freshwater Fish

Black Wolffish is an aggressive predator which originates from South America. Most of them measure about 2 ft in size. Various keepers successfully keep this fish with bichirs, silver dollars, peacock bass cichlids, and other fast-moving large fish. They have giant mouths and teeth and are considered super predators. They enjoy a large tank size with still water.

Betta Fish/Siamese Fighting Fish

Aggressive Freshwater Fish

Bettas are carnivorous, mostly consuming insects and their larva in the wild. Males love to fight, particularly against other males. Females can sometimes avoid being forced under the cover by escaping into entanglement. Bettas in tanks can coexist with other fish species, including guppies. Betta is one of the most popular freshwater fish species globally and very well demanded their beauty and ability to live in small spaces. The fish is famous for its aggression and beauty.


Aggressive Freshwater Fish

Plecos need plenty of algae wafers. Having a little driftwood for the aquarium is the best idea. If you meet your nutrient needs, it will have no problem. Otherwise, the fish can be a distraction when eating other fish. Plecos can become aggressive when there is food around the tank, especially if there is no food, even in a big tank. You will often see plecos that appear semi-aggressive, but if their needs are not well met, they can get quite aggressive.

Wolf Cichlid

Aggressive Freshwater Fish

Wolf cichlids are chunky fish with an imposing eye shape. A largemouth, robust jawbone, and a few sharp teeth can assist in consuming other fish. The primary color of the fish ranges from high yellow gold to silver. They require lots of swimming spaces with shallow sandy substrate. The fish are very alert to what is happening outside of the tank. Many are also likely to follow you or react to your presence.

Convict Cichlid

Aggressive Freshwater Fish

Convict cichlid is popular with aquarists because of the striking pattern of blue-black stripes against a grey-blue background. Convicts aren’t huge like piranhas or devils but don’t get fooled by their size. When two convicts defend their territories and borders, they must drive away from the other fish and take down more powerful fish until their deaths. Don’t try to keep this species in a community tank.

Red Devil Cichlid

Aggressive Freshwater Fish

The Red Devil Cichlids are active “in your face” Aggressive Freshwater Fish. All this energy can have a destructive effect on the tank. They’re noted for shredding flowers and rearranging tanks’ decor. Nevertheless, these fish also feature great personality, making them a favorite for big fish owners. Sometimes they go in front of the tank, like asking for some treats when there is someone there. That’s why they’re so popular.

Jaguar Cichlid

Aggressive Freshwater Fish

The fish becomes enormous and is not everyone’s favorite. If you want to breed them, place together one male and one female of the same size and then hope they pair off. The fish is named after a big cat and has a mean attitude similar to a big cat.

Bumblebee Cichlid

Aggressive Freshwater Fish

Mbuna cichlids show a yellow base color with darker brown vertical stripes. But bumblebees carry stings. So a lovely looking fish, but he can kill any tankmate it sees. I kept only two for the last ten years, and they were the most mean among most fish I kept.

Oscar (Astronotus ocellatus)

Aggressive Freshwater Fish

Oscars are somewhat aggressive towards other fish but are very aggressive with their tank decor. The small fish are tall at around one foot and may require 70 gallons or more water for survival. Other fish have even broken into heaters with which they are not familiar. To prevent aggression toward gadgets, it is advised to keep Oscars in systems with sump. This limits the number of devices in the main tank.

Acai Cichlid

Aggressive Freshwater Fish

Acai cichlids are only marked as half aggressive but have super quick and relentless energy reserves and may chase the same fish to nip their fins for days. They may not be as large as the wolf cichlid – but the size can do much damage.

Jewel Cichlid

Aggressive Freshwater Fish

Jewel cichlids are one of the most Aggressive Freshwater Fish I ever saw. If they are in pairs, they likely won’t tolerate anyone else in the tank. The story of them having killed fish is everywhere on the internet.

Rainbow shark

Aggressive Freshwater Fish

The rainbow shark is a small tropical fish species that is native to Thailand. It is not a real shark. As rainbow sharks mature, their behavior becomes quite violent toward other fish in the aquarium. They are a threat to bottom-floor dwellers and attack them to maintain their territories. It would be best to aim for species that can defend themselves but have a peaceful nature, such as Barbs, Danios, and Rainbowfish. You can find nice tankmates for this breed.


Aggressive Freshwater Fish

Piranhas are more than 60 species of razor-toothed carnivorous fish that habits South American rivers and lakes. Most piranha species never reach a length exceeding 60cm. Pygocentrus nattereri, white piranhas, can reach a maximum height for a year after fry. Many fish were scavengers but primarily fed animal protein. They’ve attracted to the scent of blood the majority of species scavenge more than hunt down.

Wrapping it Up

We hope you found this guide on different freshwater fish useful. Don’t hesitate to reach out with any major questions!