Betta Fish Diseases (Ultimate Guide With Pictures)

Betta Fish Diseases

This Guide to Betta Fish Diseases can help you identify different illnesses your fish might go through and treat them as soon and effectively as possible. Different diseases can stem from a variety of causes, such as fungal, viral, bacterial or parasitic. However, many of them have simple and easy treatment if you can correctly identify what it is.

Betta Fish Diseases, Symptoms and Treatment Comparison Table


Betta Fish Medication Comparison Table

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Complete Guide to Betta Fish Diseases and Treatment (with pictures)

Betta fish, also called Siamese Fighting Fish, tend to thrive in simple but well-equipped tanks, usually filled with various plants and decor to hide in. Most betta, when not well, have symptoms that clearly indicate it may be sick, such as droopy fins, lethargic swimming and dulled colors.

It’s important to understand these symptoms so you may be able to care for them as soon as there’s a hint that they may have fallen ill.


Betta Fish Diseases

Fungal Diseases in Betta Fish

True fungal infections in betta fish are less common than parasitic or bacterial infections.

In general, they usually appear as white cottony growths on fish; like white sheets of fuzz, white lumps or white dusty slime. They can also be internal, and in a lot of cases, fatal if not treated properly.

Fungal outbreaks can follow other bacterial or parasite illnesses where the fishes body has open wounds and a weakened immune system.

Fungal diseases are most commonly brought on by poor water quality, infected food or open wounds. Therefore, such diseases can be prevented by keeping a clean aquarium environment and avoiding infected injuries.

Antibiotics like Methylene Blue and Clear Fungus are effective at removing fungal diseases on fish.



Betta Fish Fungal Disease


Fin and Tail Rot

Fin rot can be the result of a bacterial infection or of a fungal infection, where a betta’s fins and tail begin to decay and rot away. The fins may also develop a white layer on the surface if it’s a fungal infection.

This common condition isn’t fatal if treated early and fins will eventually grow back, though they may not be as vibrant or long as they were before.

Fin rot may be caused by poor water quality, a poor diet or damage caused by other fish nipping your betta’s fins.

Treatment can include a quality diet high in Vitamin C, along with drastically improving water quality in terms of it’s pH, temperature and various pollutants like ammonia.

Your betta can also be treated with an antifungal medication to prevent secondary infections. For example, Hikari revive is an effective prescription of 5 days, with clear instructions for its use.

It’s also recommended to remove fish that like to nip at the long fins of betta fish, or any sharp artificial plants or ornaments that could also tear fins.


Betta Fish Diseases - Tail or Fin Rot

Water Mold

Another common fungal illness is Saprolegnia. This is a water mold domycede infection, also known as oomycete infection, or winter kill.

Water mold shows up as whitish fur-like growths and/or pink or white external body bumps.

Foods rich in Vitamin C, salt treatments and medicinal baths with Methylene Blue are all recommended treatments. Ensure your betta is in a high water quality environment and the tank is kept at the optimal temperature.

Bacterial Infections in Bettas

Bacterial infections manifest in many ways and are often associated with poor water quality, fish stress, or contaminated food. Common signs include cloudy eyes, a white film on the Betta’s body or fins,  tattered fins, and hemorrhaging (bloody patches) or open sores (ulcers) on the mouth and body. The fish may be listless sitting on the bottom of the tank.

Columnaris (Mouth ‘Fungus’)

Columnaris, are bacterial diseases that can cause a fin to rip or flake. It appears as a pale patchy sheen on the fishes body.

It also causes skin ulcers or unexplained lesions, yellow spots or marks on the face, sometimes resembling a cotton growth near mouth.

The fish is prone to breathing difficulties because of this condition and its damage to the gills. If you don’t treat the infected fish it dies within 72 hours.

The disease could easily be prevented by treating open wounds and fungal infections in aquariums.

Columnaris can be treated with tetracycline and anti-biotics containing sulfa 4 TMP SulfA and triple sulfa. It’s also possible to prevent this issue by ensuring the water is optimal in the tank (free from ammonia, PH in correct balance and correct temperature for Betta fish.

This is a bacterial illness which causes white circles around the mouth and lips of fish. It is often prevented by keeping water clean and clogged. It will cure mouth fever when antibiotics are used.

Others medicines used to treat fish fungus can also help treat the infection. The infected fish can’t survive if sickness doesn’t get dealt with early enough so the diagnosis may have to be delayed.

Columnaria is very contagious so you need to remove and incubate infected Bettafish.

The diseases may be internal but the most often externally occur on Betta. There is a slow and a fast form of this infection so depending on the one your Betta had this will determine how likely it was to overcome the illness. To prevent this disease, maintain good water quality and disinfect all equipment before entering the tank.

As an precaution ensure a high water level and disinfect the equipment at the entrance to the tank while keeping the water safe from the bacteria and other viruses in the. The disease is sometimes found in fish caught before.

It is easy to confuse Columnaris with a Fungal disease called Saprolegnia. They look similar, but require quite different treatments. Saprolegnia presents itself with patchy white (or cotton wool look) on the dying tissues of the fish, whilst Columnaris appears more as a patchy sheen on living tissue.

Columnaris is treated by using an antibiotic or a copper sulfate. To treat Columnaris you must remove the bacterial infection from its whole tank, changing the tank water, vacuuming gravel and adding aquarium salt. After cleaning the tanks you can.


Bacterial Septicemia

Bacteria septicomy is the less common fish illness caused by Pseudomonas or Streptococcus bacteria. It is a serious condition, that if not treated early will result in death.

Symptoms show up as hemorrhages in the mouth and ulceration of the body.

Treat the condition with a medicated food.


Velvet disease is caused by a protozoan parasite. Other names for the condition are: Coral Disease, Gold Dust Disease or Rust Disease.

Symptoms show up as many tiny golden dots covering the fishes body, giving the appearance of ‘rust’. The fish will be agitated, rubbing itself against rocks and plants.

Treat the illness by raising the temperature of the water, dim the lights and apply aquarium salt to the tank. In addition, treat with copper sulphate for ten days.

Aquarium Pharmaceuticals Bettafix medication is useful treatment for many other diseases and ailments. It can cure many of.

The fish infected with velvet appear have a rusty face and tanned head including skin glands and belly and it may have black spots all over the skin caused.

If the velvet has been decontaminated before too long it can be fatal.

The parasitic disease could be prevented by improving the quality of water and making the conditions comfortable. I’ve lived with betta for the past 10 or 13 and saw this remedy help to heal our aquatic pets’ injuries.


Dropsy is a condition rather than a Betta fish disease. Build-up of fluid in the body causing bloating and protruding scales can indicate a number of sicknesses including bacterial infections, liver disfunction and parasites.

Swollen belly lining and the swollen belly are caused by accumulation of internal fat.

Infections can occur if you get one of them for medical reasons. Symptoms usually present are white scales and sunken eyes.

There is no known cure for dropsy but medication such as Betta Revive can help with the illness.

Most fish that can be at risk for dropsy don’t survive and most are die of infections. The bacterial infection can be avoided by keeping the aquarium free and by feeding fish with vitamins rich foods such as vitamin rich fish. Dropsy is a bacterial infection with effects on the kidney systems and its cause.

Dropsy Disease in Betta Fish

Swim Bladder Disorder

Pool bladder disorder is due to constrictions, poor water conditions parasites or bacteria and increased organ space (oesophagia).

Fish that have an irregular bladder can also lay at the bottom of the tank and flop out sideways or upside-down in the water.

It can be controlled by maintaining high quality water, avoiding overstocking and providing the fish with the correct amount of fresh and fiber-rich foods.

The treatment can end by raising water temperature, letting the fish fast for a few days and then feeding with cooked peas.  Medicinal baths also help to treat the disease.

Betta Fish Diseases



Hemorrhagic symptoms include bleeding to the face and mouth of the fish, as well as pop-eye and a swollen abdomen. The infection is treatable thus the death is very low.

A diluted solution could prevent salmonella infection by killing Yersinia ruckeri bacteria which causes the diseases.

The treatment of hemorrhagic may include the use of antibiotics such as ampicillin. The disease’s fatality is small.

Hemorrhaging is also a symptom of Septicemia, treatable with an antibiotic medication.


Pop Eye

Pop eye is often a sign of a health-related bacterial infection such as Vibrosis (Red Boil) or Piscine Tuberculosis.

Bacterial infections that lead to Pop-eye can be avoided by prevent infection in the aquarium.

Quarantining new fish before placing them in the main aquarium.

Alternatively Pop-eye is one of the possible symptoms of Septicemia, a viral illness. Antibiotic drugs such as Tetracyclines may treat this illness.

Betta Fish Popeye


Cloudy Eye

Poor water quality (particularly when PH drops) often leads to cloudy eye in Bettas, either directly or indirectly, generally due to a weakened immune system. In addition, internal parasites, such as protozoa or flukes can lead to the condition

The bacteria is found to cause a white film covering the eyes. It can be treated with antibiotics including Metafix and Fungus Clear.

Providing clean water and a healthy diet are the best treatments for Cloudy Eye. Salt treatment or medication with an antibiotic are other helpful treatments.

This type of bacteria illness is not fatal, but may impede vision.

Cloudy Eye Betta Fish Diseases


Parasitic Illness with Betta Fish

Symptoms indicating that your fish has a parasite infestation include: clamped or droopy fins, loss of weight, there may be white spots on the skin or gills or you’ll notice your Betta trying to rub against aquatic plants or ornaments in the tank. Some Betta fish appear bloated.

Most parasitic diseases in Bettas occur as a result of poor water quality.

Parasites Betta

Hole in the head

Hole-in-the-head disease shows up as pale ulcerated areas around the head. It isn’t a disease common in Bettas.

The fish which have been infected usually dies after several days in cases where it was not treated adequately earlier.

Treatment with Vitamin C enriched food and a parasite medication such as Parasitic Clear.

Anchor Worms

Anchor worms are parasitic worms that attach to the fish’s body leading to ulcerations. They are a devilish parasite from the Lernaea species (actually a type of crustacean, not worm) that embed their anchor-shaped heads into the scales and flesh of their host fish.

The parasites are visible to the naked eye as they protrude from between the Betta’s scales. Fish will show signs of irritation and its gills may be damaged (showing breathing difficulties).

Treat infected fish by physically removing the parasites with forceps. Then give the fish a medicated bath to prevent secondary infection. Using an insecticide medication or a potassium permanganate ‘dip’ will also rid the fish of these paracites.

Anchor Worm is prevented by treating all newly infected fish and keeping the water clean. A condition that is diagnosed untreated can become fatal.

Anchor Worm on Betta Fish


Ich, a parasitic disease also known as White Spot, causes small white spots to cover the fish’s body. The fish will be irritated and may rub itself on rocks and plants.

The sickness can be treated by raising the water temperature slightly and using a parasite medication such as Ich-X which gives excellent improvement within a week.

It is preventable by changing and conditioning of water regularly.


Viral Infections

Viral infections are common in Betta fish, but they can affect all aquarium fish. There are no known treatments or cures for viral infections. Fish that are suspected of having a viral infection should be removed from the fish aquarium straight away to prevent spreading to other fish.

Betta Tumors

Bette tumors are usually cancer – lumps growth or minor bumps/cysts that show up underneath a fish skin.

They mainly affected reproductive organs, gills, tail and waist.

The tumors can be controlled by feeding the fish a clean tank, maintaining a healthy diet, treating any other infections or by keeping carcinogenic elements away from the tank. T

he benign tumours and cysts can be treated in several ways depending on the cause of the lump or bump. These malignant tumors are hard to cure but simple surgical procedures can aid.


Betta Fish Chemical Poisoning

Ammonia Poisoning

A build up of ammonia in the aquarium can lead Bettas becoming sick. Decomposition of organic matter (fish wastes, excess food and nutrients) in the water increases the likelihood of a toxic level of ammonia.

In a well cycled aquarium, where a healthy population of beneficial nitrogen consuming bacteria live, ammonia levels will always be in check. However, if this balance is upset nitrates in the water build up leading to the water being polluted.

Symptoms of ammonia poisoning in Betta fish include: an increase in body mucous production. Gills will be inflamed red and may bleed and the fishes overall body color will darken. Sometimes the fish will appear agitated or distressed.

Chlorine Poisoning

Tap water in many countries contains chlorine which is put into the water to kill pathogens. Chlorine is toxic to Betta fish and will cause death if the fish is left in the chlorinated water for too long.

Water added to an aquarium from the household tap must be treated first to remove the chlorine. There are commercial chlorine treatment products that can be bought that will do the job.

Alternatively, fill your tank and run the filters, allowing it to cycle for a few days. The chlorine will dissipate. To speed the process up, you can boil the water to remove the chlorine.

Symptoms of chlorine poisoning include restlessness and erratic behaviour– such as shooting around the tank and jumping. The fish may have trouble swimming and show incorrect body positioning. Its gills will be inflamed.

It is important to remove the fish from the tank and place it in healthy water. If the damage to the fishes gills is minimal, it will likely recover.


Isolate sick fish immediately

If your betta shares its tank with other fish or aquatic creatures, immediately move him towards the quarantine or hospital tank. That last thing should be to expose other tank participants to risking an aquatic illness.

It is also not a necessity or a waste to medicate healthy fish. So drop it into your hospital tank to a separate tank where you will only medicate the sick or injured fish then give yourself another chance to recover. Whenever someone sickens him you need to treat her properly.

Sick Betta Fish Behavior

Some patterns of behavior are correlated with a stressed or sick betta fish and yet not necessarily fully contracted disease. However. This behavior can give you the most accurate and quick diagnosis of when your fish is sick. This behavior and correcting its errors early are important. Attempting to control the problem could increase risks from an outbreak and eventually cause more serious problems.

Betta Fish Diseases

After diagnosis you can now follow the treatment options. Never stop treatment early as it can increase parasitic immunity. If your betta fish lives in solitude you may choose to keep them in the tanks they already contain. If they survive in a community tank you may quarantine them in separate hospitals as a disease-treated tank to treat them. List some famous Betta infections listed below… Infection b. tinnitis is commonly inherited.

Sick Betta Fish signs

If any of these things is unusual or even when parts of their body or fins look unusual to you, trust your instincts. Remember that treating in the early stages of any condition will most likely lead to good outcomes. You have sick fish at hand. If you notice any sign of either any betta fish diseases or any more you may have a disease to contend against that can lead us to a disease.



Keep a First Aid Kit – Hope for the best prepare for the worst

Keeping a first aid kit ready can be a very useful thing for any fish owner. That should be treated as an essential kit for routine care of the fish. Do you or something in your family need medical attention for a sick or injured person? Why would you wait till they are sick on your fish before finding a drug when they might really need them? Let us ask.

A note on preventative medicines

Your aquarium waters are always full of good bacteria with most of it being beneficial. Even harmful bacteria won’t hurt your fish unless their immune system is well developed. By using antibacterial medicine when there are no visible indications of infection, you may end up hurting the good or poor bacteria and giving them the chance to adapt to change. Your best bet is practicing good aquaculture maintenance because diseases have no effect on fish unless they get good care. Good aquaculture keeps should be practicing good care. Keeping fish healthy is the only solution that can prevent disease.

What to put in your Betta First Aid Kit

Ampicillin used for pop-eye and Gram negative infections. Kanamycin – Antibacterial for bacterial disorders. Maracin 1 and 2 – Antibacterial and antiviral medication effective for milder types including frank rot and rhinitis. Jungle infestation Eliminator – fizz forms. Ideal for mouth rot swollen fins that cause fungus and stinging and for eye fog diseases. Works slowly, but remember: dosage appropriately; a full packet is for a 40-gallon tank!

Check water chemistry before treating

Why do you think your mother is unwell? Common toxic substances that form in aquariums creating poorwater conditions are ammonia nitrite and nitrate. Check your water by use of liquid testing tubes. Do a water-change in case you find no unsafe water. The symptoms of poisoning by each potential culprit include vomiting and diarrhea swelling an.

Timing is everything

Some betta illnesses can quickly get worse, leaving few hours of time free for the hunt in the pet food store. Preventing the first stages of illness is probably the easiest path to success. I think therapy should be given if it is difficult.

Questions and Answers

My betta is pale and still alive but is beneath its tank. Very likely that you’re overfeeding him or he’s developed a swim bladder condition. The transparent ring is highly likely fungal, so take one such drug as the Bettafix remedies in that article. You should try cleaning and conditioned the water and maintain the right parameters in water such as pH ammonium nitrite and cadmium. Get me some ways to treat the condition. If she looks sick be careful to monitor it for the next few days to see if she’s going to show any signs of sickness. Does the guy look sick?


Fin-tail Rot Bacterial/Fungal Clean living conditions Tetracycline/Water-Myxazin Columnaris Bacterial Treat open woulds. Clearfish Fungus Avoid prima e infections. Methylene blue parasite clearance hole in the head Parasitic Keep carbon out in water. Betta Tumors Malignant/Benign give healthy foods surgery/viral medication Betta Revive Pop Eye Bacterial Control other disorders. Faking/Raising water temperature to avoid Overing Fasting/Raising water temperature Betta Remedy/Fishzole Ich Parasitic Change water regularly.

Final Thoughts

Some fish could develop behavior defects like excessive stress, lethargy and poor appetite. Betta fish can suffer from fading colors or abnormal color changes and can develop things like bubbles and solid particles like blobs on their bodies. These conditions could be controlled by regularly changing and conditioning water and by optimizing parameters for ammonia, pH, Nitrite, Nitras, air hardness, water temperature and pressure. Animals showing signs or symptoms of distress should see veterinarian immediately. If you don’t understand why your fish doesn’t work do look through some of the answers listed here.

Why is My Fish Laying On the Side?

Why is My Fish Laying On the Side?

In this article we address the question: Why is my fish laying on the side?

Does this mean your fish is diseased? The short answer is – possibly, however, there are many factors that may result in a fish laying on its side. Gene traits, diet, habitat conditions, opportunistic pathogens, fish syndromes and water quality all may play a role.

Why is your fish lying at his side?

There are many possible causes for the fish to lay flat on the bottom of the tank. Not every reason is terrible, but it’s a signal for you to watch for future changes in your fish behavior.

Use position and behavior to diagnose and treat common problems. This article will help you learn how to solve and analyze each difficulty you face.


Cause for a fish that’s laying on the side

The fact that the fish is acting strange and has sunk, laying on his side at the bottom, is frustrating to any fish keeper. It can happen with all species of fish.

The early stage of any problem or disease can be detected right away when you notice any strange swimming or behavior.

If your fish is swimming and lying at the bottom, that should signify that something is incorrect.

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What if they’re at the bottom of the tank breathing heavy?

Fish laying on the bottom of the tank and breathing deeply require action as soon as possible. Usually, rapid breathing is caused by some pollutant or toxic in the water.

In most cases, it is poisoning by ammonia, nitrite, or other nitrogen. This behavior can also occur when fish are exposed to high temperatures.

Perform tank tests to gauge temperature and nitrogen levels. Next, adjust your parameters and maintenance schedule to keep them from spiking.

What if your fish is at the bottom of the tank not moving?

If your fish is laying and not moving, calmly observe if the fish is making any movement, has some strange stain on the body, as are their fins and their breathing.

Once you have enough information, take some action indicated in this guide that makes the most sense. Asking for help from experienced aquarists and a veterinarian is a great way to go.

Treating a sick Fish

Don’t be intimidated by the different medications available for your fish. First, you’ll need to diagnose which disease your fish has and choose the best treatment to treat it.

If the tank has plants or snails, it must be taken out in another tank; some medicine can be poison for this type of life.

Remove is the best way to prevent your favorite plant from dying from drugs. Let’s examine some diseases that might explain your fish lying on its side.

Depending on where your fish has been kept, there could be a water quality symptom.

Is it normal for my fish to lay on the bottom of the tank?

There are several reasons for fish would lie on the bottom of a tank, some of which are common and harmless.

Learning to recognize some behaviors can help you to solve a lot of issues. Know when your fish are stressed helps prevent your animal from getting sick.

Sickness & Disease

Several diseases can plague fish health. Typically they experience more illnesses when they are with weaker immune systems.

Diseases like Ich, Bloat, Dropsy, and more are usually caused due to stress or lack of proper care. Keep your head on the water conditions and make sure all the water parameters remain within the recommended range.

When your fish is stressed, they got more susceptible to disease. It is essential to maintain adequate and stable water conditions.

Tailor Fin Rot

Fish Fungal DiseaseFin rot can usually be fixed when treated with Ampicillin or Tetracycline. Clean water will reduce the chances of further fin rot.

You can also use a natural antifungal for two days. Make sure to keep regular water changes and to vacuum on a scheduled basis. Fin rot is probably not the most critical reason your fish lies in the tank, but it is a severe disease.

Fungal Infection

Fungal infections are highly contagious and are easily spread through other tanks’ occupants. Adding salt to the tank can cause serious problems; overdosing salt can damage fish, invertebrates, and plants.

Add salt to the proper concentration to treat a fungal infection may help; water changes must be carried out before each application to keep saline levels under control.

Ammonia poisoning

The changing conditions of water’s chemistry can cause many of these issues. If the ammonia level in the tanks is too high, you can perform a partial water change.

Remember to cycle your aquarium before adding fish continuously. Keep the tank clean, avoid overfeeding, and correctly size your filtering capacity.

It’s best to remove a large quantity of the water every week; the more frequently and the greater the amount, the better; remember to stabilize incoming water parameters with aquarium standards.

Nitrate poisoning

Fish with nitrate poisoning can have a high breath rate and look pale or discolored. They may seem lazy, moving strangely. Proceed with the water test and also a partial or total change.

Swim Bladder Disorder

It affects the swim bladder of the fish, an organ that helps the fish fluctuability. In medical terms, the fish suffer either positive buoyancy or negative buoyance.

Symptoms include sinking to the bottom or floating at the top of the tanks, floating upside down or on their side, or having trouble maintaining a normal position.

Affected fish can eat every day or have little appetite. When serious buoyancy problems exist, it is possible that the fish will not feed usual or perhaps even reach the surface.

Symptoms such as a dislocated belly and curved back can be present on affected fish. A swim bladder defect is the consequence of temporary or permanent impairment of the swim bladder.

There may be the pressure of a swollen stomach, an accident, or a bacterial infection. Sometimes after overeating, fish might swallow air on purpose. To cure your fish, you need to know the origins of its bizarre behavior.


Dropsy Disease in Betta FishDropsy is not disease-specific; it occurs when his belly swells and causes scales to protrude sideways.

The dropsy syndrome is fatal if not quickly treated. Early signs of dropsy are challenging to diagnose.

Dropsy is a direct consequence of an infection indirectly caused by poor water quality. Proceed immediately with the total water change, aquarium cleaning, an antibiotic medication.


Velvet usually appears after a tank is not adequately treated using a water conditioner. If your fish is scratching its skin on aquarium décor or rocks, he likely suffers from velvet.

Clean the tank and add water changes will help remove the velvet. Keep water parameters stable and perfect. You should use medication for Velvet disease in case of infection.

Ich (white spot disease)

Ich (Ichthyophthirius multifiliis) is a protozoan and is found in many aquariums and reservoirs. A healthy fish’s immune system shields it from ich itself, but it can be vulnerable to stressed or injured fish.

Infrequent water changes, improper water temperatures, and poor food choices can significantly weaken a fish’s immunity system.

To treat ich, raise the temperature to the equivalent of 80 degrees Fahrenheit. Maintain water temperature at 82 F for 14 days; this should break the reproduction cycle of the parasite.


Betta Fish PopeyeMore than one culprit may be identified for pop-eye, but regular tests and water changes will be the first thing you need when seeing eye bulging in your fish.

If the water conditions are in a good state, treat your fish with a medication to kill Positive gram bacteria or use a drug for cloudy eyes or pop-eye in the bottle.

The water is too hot or too cold, and O² levels.

Cool water delivers oxygen much faster than warm water does. If your aquarium is filled with no oxygen, then your fish is choking for air.

Cool the temperature in your tank slowly if you have a fan or room air conditioner. To inject oxygen quickly into the water, use an extra pump or air compressor to help in gas change.

Ideally, the water temperature in your tanks should be the most suitable for the species you keep. If the temperature falls below the animal’s tolerance, your fish starts to stifle its metabolism.

Oxygen gets absorbed slower. These combinations of events can cause your fish to become lethargic. Use an in-tank heater to raise the temperature in the aquarium steadily.

Low oxygen levels make the fish passive and quiet, as well as low temperature. Keep the aquarium well-aerated about its temperature.

Extreme current

Some fish don’t cope well with strong tides. If you see considerable flow coming from a filter or an air pump, your fish can be exhausted.

Add a sponge filter to restrict the water flow to your filter. Alternatively, it’s possible to direct the current towards the décors. Your fish might have given up fighting against water flow and settled to rest on the tank bottom.


Some species of fish do have excess weight; check the body of the fish to avoid overfeeding. A lazy fish should also have a good appetite and can continue swimming when it wants.

If the behavior of your fish starts suddenly to change, watch out for additional signs of trouble and be proactive and make a water change to be safe, constantly checking the parameters with good quality tests.

If you see a fish in your tank laying on his sides, think that doesn’t always have to be a problem. Sometimes fish sleeps and relax on his sides. Specially bettas.

Old age

Old-age fish no longer have the same vigor as their younger companions and enjoy their quiet time in the aquarium corner.

Your fish has lived a long and happy life and loves to lie down when they want. They can usually quickly wake up to feed or go to another spot. It’s not a problem to be concerned if an old fish may lay over plants or at the substrate.

Physical damage or injury

A fall, encountering other aggressive fish species, or other mechanical damage can cause your fish to stay laying.

If it was injured during transportation or has a swim bladder disorder, it could die without medical intervention.

If your fish is struggling with some trouble and does not improve from treatments, then it’s probably too late. I suggest considering a humane way of euthanizing it.

External or internal parasites

Parasites BettaSymptoms usually involve reddening blood vessels, white feces, and swollen belly.

It is a disease gateway for bacterial infections, which cause bloating, skin infections, fin rotting, and many more.

Always inspect your fish and look for all potential signs when there are. The use of anti-parasite medications is necessary.

Just take it easy

It sometimes doesn’t feel worth worrying if a fish lies on his side. If pelvic fins keep coming in motion, then your fish may relax.

They may undergo movements to be able to rest under surfaces. Laying rest is normal, and no need for any fear! Check their habits. If your fish species like to sleep in this way, you’re OK to relax. Please take a peek at the fish behavior inside their tank.

Bloating from swallowing too much air

When a fish uses swim bladders, they contain two bags. This more powerful one connects directly to the stomach. This can result in a disfigured swimming bladder and associated disorientations of buoyancy. In this case, offer food with high fiber content.

Bored Or Depressed

Fish are curious animals by nature and constantly contact the environment and the tank mater. In the wild their exhibit exploratory behaviors, like find food.

Fish can get bored in places without plants, decor, being inside tiny spaces. A bored fish can even scratch its fins on decoration surfaces as well as rub against the substrate.

Developing health problems

It is not uncommon for healthy fish to lay around the tanks because they’re sleeping, acting lazy, or bored.

Sometimes you’ll realize your fish is stressed or tense for 1-3 days before clearer symptoms appear. Be worried if they show signs of begin developing another disease. Test the water and, if needed, proceed with maintenance.

The aquarium is not large enough.

Many new fishkeepers mistakenly believe fish can live anywhere. If your fish has been trapped in confined conditions, they will not thrive for long.

Try increasing the tank size; you can also provide an array of enrichments for your fish, like caves, plants, and natural decorations. All this will make your fish happy and healthy. Give the fish a little extra room for exploring.

Do your research

This article was meant to cover just some basic details about this symptom to raise awareness among fish keepers.

This article is not intended to substitute for diagnosis prognosis, treatment prescriptions, and individualized veterinary medical counseling.

When animals develop distress, you should first take them to a veterinary center. If you think an infestation is on your fish, you will need to do additional research about ways to prevent this issue. The articles are accurate to the best of the author’s knowledge.

Offer a fresh diet

Bloodworms, brine shrimp, and fresh vegetables are offered as snacks, and the high-quality commercial meal makes fish more healthy.

It’s in the water

Cold, poor, and neglectful water quality can cause diseases. Get to know about your fish personality to see how he usually acts.

Polluted water will allow you to know when he changes his routine and maybe starts to develop some disease.

You should do the following if you want to ensure optimum water condition. Perform weekly water changes and tank and substrate cleaning to ensure proper health.

Also, offer a varied diet and taking care of your fish. Your fish should be in a tank with the perfect setting for him to thrive through posteriority. Hot water can speed up your pet’s metabolism and shorten your fish lifespan.

Similarly, cold water can cause your animal to be lazy and sit on your side. You should change their water often; the more, the better.

During the water change, use a siphon and vacuum the substrate, removing all the dirt stuck or on it, lift and clean the decorations, rocks, and trunks.

If done correctly, this will ensure that your water will be kept clean and free from pollutants. Make sure always to test your tank water to set standards and test your tap water to see what to fix.

Always condition your water with specific products for aquariums; this will ensure the removal of toxic substances such as chlorine and heavy metals. Have an accurate test; low-quality tests cause confusion and errors for the hobbyist.

Is your fish lying on its side but not dead?

Why is My Fish Lying on the Bottom of a Tank

Overfeeding can cause stagnation and swim bladder disorder. The swim bladder is an organ that helps bony fish to remain at a certain depth by controlling their density relative to that of water.

Fish use such a system for buoyant to move on the water. The gas expands with lighter pressures helping the fish to rise while being compressed as the fish dives.

Several signs of overfeeding may cause swim bladder disorder, and many people don’t know precisely how easy it is for fish to get overfeed.

Is your fish lying on the bottom of the tank?

Not all fish are potent swimmers, and they will become tired and lethargic whenever the flow of water in their tanks is too heavy.

Check for sores, bulging eyes, white spots, fuzzy areas, tail rot, or another sign your fish may have an infection. This problem may be caused by fungal illness or bacterial infection in a fish.

Test other water parameters to check if everything is how it should be.

What can you do to help your sick fish?

A dirty tank is a significant contributor to any tropical fish disease. If your fish has a bacterial infection, you can take it to a separate hospital tank to keep it in and sterilize the other tank. Keep a fish emergency kit, have fish medication on hand is a bright idea.

Types of Fish Medication

Fish medicine can usually be found online, but look in your loyalty fish store if you don’t have the medication available.

Even if you have no idea what causes your fish to become sick over time, a drug like Melafix gives them a fighting chance.

If you do not find or are in doubt about which medicine to use, use salt or medications based on natural essential oils and proceed with good hygiene and partial water changes in the tank.

All possible causes

Understanding your Betta fish’s behavior might help determine when you must act. Let’s find some of the causes why the fish lay at the bottom of the tank.

Senior citizens

As the fish becomes older, he slows down and gets lethargic. You may notice that he’s getting tired more often.

When he ages, he can usually be found lying in either the plant or the bottom of the tank. It is vital to keep you on the cutting edge with the water changes and watch out for opportunistic diseases, aggressive tank mates, or anything that affects the old fish.


Now you know the main reasons & have got your answer for your query Why is my fish laying on the side?

Use the information explained here correctly and see the importance of keeping the maintenance and water change up to date. Keep your fish in large aquariums, with a good filter system perfectly sized and everything else that the species need, especially the parameters to live correctly.

Keep a first aid kit for fish prepared. Know that drastic water changes will affect your animal’s health and their lifetimes.