Amano Shrimp Care Guide – Everything You Need To Know

Amano Shrimp (Caridina multidentata) is a very resistant and easy species to maintain freshwater shrimp, in addition to being part of the cleaning crew, constantly removing the algae from the tank. The shrimp originates from Japanese swamps and mangroves, where the aquascaper Takashi Amano presented this species to the world of planted aquariums. Optimal water parameters are 64° to 80°F with pH between 6 and 7.5. They prefer harder water.

Amano shrimp are peaceful inhabitants and will not create problems in the aquarium if they are kept with appropriate tank mates. These creatures love to eat anything in the tank, mainly natural biofilm and algae.

Amano Shrimp (Caridina multidentata)

Amano Shrimp are native to the fresh and brackish waters of Japan and Taiwan. They feed mainly on filamentous algae and microfilm. Best kept in a group of five or more, this shrimp may easily consume various algae types and help clean algae off leaves of aquatic plants. Peaceful, hardy, and adaptable to a wide variety of water conditions, this species will thrive in nearly any peaceful community aquarium and also tolerates low temperatures. They enjoy a planted tank. The Amano shrimp, like big groups and the freshwater aquarium, feeds mainly on algae and biofilm.Amano Shrimp


This Freshwater shrimp manages algae and the excess of bacteria and also will consume leftover food. Better to provide them as housing, a mature aquarium, already cycled for a while, with its micro-habitat formed; in addition to providing a greater nutrient cycling capacity, it also provides algae and biofilm in sufficient quantities to feed the fauna. It would be best to house the Amano shrimp with small fish that don’t want to eat them. The minimum tank size recommends it is about ten gals.


The Amano Shrimp is translucent brown/tan color with a brown stripe covering the entire back. You may keep it together with other peaceful fish. Can consume leftover fish food, algae, biofilm, and some detritus make the shrimp a valuable cleaner and essential part of a tank ecosystem.

Everything about the Amano shrimp (Caridina multidentata), aquariums, parameters, etc.

The Yamato shrimp, popularly known as Amano shrimp, is in honor of the greatest aquascaper. Takashi Amano is becoming more and more common in aquariums around the world. The same is native to Japan and Taiwan. Being a great consumer of algae captivates aquarists who suffer from the excess of algae in their aquariums as a natural way to solve the problem.


Highlighting the last name on the popular list, we can emphasize its importance in the knowledge and popularity among aquarists. Takashi Amano, one of the greatest aquarists and aquascapers globally, has always created it and recommended it control algae and even some residues that remain in the tanks.

Scientific name

A curiosity is that, until 2006, it was described as Caridina japonica. After some studies, he changed his scientific name to Caridina multidentataC. japonica remains as a synonym.

What are the ideal parameters for keeping Amano Shrimp?

Amano Shrimp

This freshwater shrimp has a better quality of life at temperatures from 22º C to 26° C is highly recommend. Still, they will thrive in ranges from 64 to 84 F. They are more active at higher temperatures, but they can also have a shorter lifespan because their metabolism works extremely fast. They prefer a pH of 6 to 7.5, are omnivorous detritivorous, measure up to 2 in (the most prominent being females), and are shrimp that do not suffer much from water hardness issues. Still, ideally, the Water hardness is around 6.0 – 8.0DKH. They are very demanding on oxygenation, adapting better to environments with higher levels of dissolved o2.

Tank Requirements

The minimum size of their tank must be around ten gals for one individual. Use ornaments, driftwood, and live plants; this helps create hiding places and areas to be explored. The Amano shrimp-like lots of plants, moss, etc. in the tank. They are not demanding light; they support well-lit tanks, such as high-tech plants and low-tech aquariums with low luminosity indexes. Because they are such resistant animals, they end up being easily uninhibited in the aquarium, being visible almost all the time, and having fun. Another curious point is that they are used to high flowing waters; for their natural behavior to be more evident in the tank, you can use pumps and filters that generate some current level and increase the water flow inside the system.


The Amano shrimp has an average life span of 2 to 3 years. His life span is directly linked to his quality of life. Always provide your Amano shrimp with the optimum water quality and parameters and the proper diet so it will live to its fullest potential.

The feeding of shrimp Amano

If you do not have enough algae in their tank, you should feed the shrimp with algae pellets or other algae-containing products, such as the vegetable-based feeds available at pet stores. It can also increase the light exposure of the aquarium, thus allowing algae to grow, which are the mainstay of these shrimp’s food; it’s widespread to see older aquarists performing this trick. Other possibilities appeal to this freshwater shrimp, such as flakes, frozen foods, or even small live food. However, algae should not be lacking in the diet of these animals, as it is their primary source of food. But remembering that they are omnivores, then yes, part of their diet includes animal protein. Leftovers of other fish and shrimp are always part of Amano’s diet. Keeping them in a planted tank helps, as the environment created by the plants ends up generating food. In addition to these leftovers and algae, they eat cucumbers, squash, zucchini, and spinach, to name a few. Vegetables should be blanched, and don’t leave them in the tank for more than an hour as this will start to pollute the water and harm the life of your aquarium in general.

How is the reproduction of the Amano Shrimp?

Amano Shrimp

Breeding these shrimp is a challenging task in some ways, as while adult shrimp live in freshwater, larvae wings develop in brackish water, which is the grand plot of this creation. In the wild, once they hatch, shrimp are dragged by the current into the saltier waters of river estuaries and small streams. When they reach adulthood, the shrimp return to freshwater areas; thus, you will need at least two tanks with different water parameters if you intend to breed Amano Shrimps.

Amanos Shrimp Gender

It is easy to identify the difference between male and female Amano shrimp:

  1. Females tend to be larger than males.
  2. You can look at the spots on the exoskeleton. The dots on females will be long strokes, while on males, they will be spaced dots.
  3. Females will have a saddle (i.e., nest egg) under their stomach where they store their eggs, which is standard for all caridinas and neocaridinas.

With an observant eye, it’s pretty quick and easy to know who’s who. In their reproduction, as previously mentioned, only in adulthood do they live in freshwater; in their larval stage, they require brackish water to survive. Only after they mature will they go back to freshwater rivers.

Breeding Amanos

They are challenging to breed. But in nature, the male fertilizes the eggs, and the female carries them for four to five weeks. During this period, the female can be seen wagging her tail to push oxygen on the eggs; At the five to six-week mark, it will release the larvae into brackish water streams. During the development process, the water change takes place. Adults are sensitive to some levels of salt, and this can kill them.

In general, more specific information about this complex reproduction process is limited, as people who have managed to reproduce them in captivity are rare.

Captive reproduction

Some aquarists do some breeding reports; adults are kept in a 150L breeding tank with a sponge filter and tall plants. The pH is maintained at around 7.0, and the temperature stabilized around 25C. They are fed with pelleted food and eventually food for bottom fish – used as a food supplement, shuttlecock algae in the aquarium, more than they can eat. Larvae grow in brackish water. The breeder added no supplementary food. So far, the best results are:

  • The maintenance of photoperiod in 24h.
  • An aquarium with mild aeration.
  • Temperature around 24 C.

Under these conditions, the larvae began to metamorphose into post-larvae after 20 days. Higher temperatures seem to slow its development. It took about six months for a complete cycle from hatching to egg production.

Where do they come from?

Remember: Amanos are wild shrimp; they are taken from the wild and not bred in captivity, which increases the initial difficulty of keeping the individuals healthy. That’s why it’s always common to hear that the youngest of those recently added to aquariums end up dying, and aquarists created the myth that it is a problematic shrimp to breed. Its difficulty is only in terms of reproduction. In theory, breeding is easy; the problem is the feasibility of creating a system for reproduction, where, in-home, amateur breeding, there is not much space.

How to identify this shrimp?

There are more than 200 types of caridinas, and cause there are so many species, doubts are always generated about which animal is being acquired. In particular, the easiest way to identify imposters is through behavior. Other amino like shrimps are generally lazy and not good algae eaters; True Amanos are quite rapidly in algae feed speed. But the irrefutable proof of being or not a legitimate multidentata is the question of reproduction. They do not breed in freshwater aquariums; the actual Amano shrimp only breed in brackish water. But Unfortunately, it is complicated to identify the fake ones visually.

The appearance of Amano Shrimp

The body of the Amano shrimp is translucent with small dark spots. Depending on the quality of the water, they may acquire a greenish or reddish color. The body of adult females is approximately 7 cm long, and the legs about 2 cm. Visually, males are only slightly smaller than females. Thus, it isn’t easy to distinguish the sexes of these shrimp.

Compatibility and behavior in aquariums

For starters, it’s essential to know that this shrimp species is seen as an excellent meal, so you should always be careful when placing it in a community tank. They are very peaceful and have no tangible ways to defend themselves other than hiding. So, try to add them with small delicate fish.

You can put them with Oto cats, Corys, some herbivorous plecos, and snails. It would be best if you used tetras, rasboras, bettas, and other fast-moving predatory fish with caution. Offer lots of hiding places in the tank, through decorations, logs, and rocks, thus offering different lairs and hiding places.


In general, they are very peaceful among the Amano shrimp themselves; however, all that changes when the food comes out. They will frantically chase the food, and the giant shrimp will prioritize feeding; you will see a ‘hierarchy’ here. It is also recommended to put at least six shrimp for socializing and prevent this food hierarchy from turning aggressively. Other than that, you’ll see them spend most of their time foraging between the substrate and the plants to eat leftover food and litter. While not precisely a behavior, another interesting observation is when they change their carapace, it’s called molting. Soon after changing shells, they are soft and unprotected. They are more vulnerable and usually hide till the exoskeleton hardens; that’s why a heavily planted tank and many hideouts are an absolute necessity and not just decorative.

Newly cycled aquariums x shrimps

Ideally, you should add them to well-matured tanks; natural debris, biofilm, and algae are crucial for them, and in this process of acclimating to a new tank, algae are essential for success; in fresh aquariums, they will not be present; in addition to its biological filtering system, it may not be able to account for the new amount of pollutants in the aquarium, coming from the fauna.

Should I use Plants and Mosses in the Shrimp Tank?

In many cases, it is always recommended to use some mosses and plants in the tank. If it is a community aquarium, even with the species indicated above, the use of hiding places is highly recommended, precisely because of the minor stresses that the animal may suffer at times. And inevitably, he becomes more vulnerable, significantly when changing shells.

Is this shrimp suitable for my aquarium?

They are tireless eaters, help keep your tank free of algae, and are great community tank members as they are compatible with much peaceful fish. In addition, their harsh and adaptable nature makes them perfect for people looking to experiment with invertebrates for the first time.


Amanos are fun-to-watch shrimp that roam around the aquarium and interact with all the elements inside the tank. They are peaceful, and even large groups will not attack other tank mates. But also, for aquarists and aquascapers, who are having problems with algae in your planted tank, this invertebrate is by far one of the most used natural ways to maintain balance. Now you know why Amano shrimp are the most popular inverts in the freshwater aquarium.

Marcelo Pedraz
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