Gyrinocheilus aymonieri

Aquarium fish: Gyrinocheilus aymonieri (Gyrinocheilus aymonieri)
Size: 20 – 25 cm
Origin: Asia
Water temperature: 23-28 ° C
Aquarium volume: 150 l

Gyrinocheilus aymonieri (Gyrinocheilus aymonieri) – freshwater aquarium fish from the round-sucker family, which feeds mainly on algae.


Gyrinocheilus aymonieri eaters come from Asia . They live mainly in rivers, but also in flooded rice fields in Thailand and Laos.

Characteristics and disposition

The species reaches a length of 25 cm. The mouth is transformed into a suction cup for scraping off algae.

The body is fusiform shape, the back is slightly protruding, darker at the top, lighter than the abdomen. Dorsal fin with 10-12 rays, light fins, tail indented and spotted. The color of the body is gradually changing. At the beginning of life, a dark brown strip runs along the body, thinned with darker spots. Depending on the condition, it can be more or less pronounced.

As time passes, these spots become more and more visible and the body of the fish turns brown-yellow. The sex of the fish is difficult to distinguish. Males are usually slightly smaller and slender than females. Spherical papillae appear in the male’s mouth with age. On the other hand, the female shows a rash on her head during the spawning period.

Algae eaters are equipped with an additional opening above the gill slot, which allows them to breathe with their gills when they are sucked to something. In addition to the wild form, there is also a breeding variety of albino , golden, piebald and with a shorter body. The golden variety is most likely obtained artificially by injecting dye into fish. Needless to say, this is a painful process for fish and leads to a significant reduction in their lifespan. The Gyrinocheilus aymonieri is a fish that is aggressive towards its own and similar species.

Although juveniles may seem mild and skittish, the territoriality of these fish will become more and more visible with age. It is advisable to keep one individual or a larger group of at least 6 in the aquarium (a very large tank is needed).

Nutrition and feeding

Algae are the basis of the diet of these fish , but they can also be fed live, frozen and dry food. In case of insufficient algae growth, it is necessary to add green food, e.g. peas, zucchini, cucumber, spinach, chopped fruit.

If the fish will have a pod to unfortunately, they can give up eating algae by a ship of other food.


Gyrinocheilus aymonieri eaters are large and territorial fish, which should be provided with a spacious, densely planted aquarium at least 120 cm long and numerous hiding places made of stones and wood. Adult individuals can destroy more delicate species of plants, so for the aquarium you should choose the more durable ones with strong leaves, eg Mikrozorium, Zwartka , Bolbtis, Anubias. The constantly feeding fish pollute the water with humus and decayed plant residues, so the tank must be equipped with a good biological filter. Algae eaters like a strong current of water, which must also be well oxygenated.

Intensive lighting will provide them with adequate algae growth in the aquarium. Choose your roommates carefully. Algae eaters often attach to the body of large, highly flattened fish such as discus , cichlids and angelfish , depriving them of their mucus, which can even lead to their death. Fish that are similar and residing in the lower parts of the tank should be avoided. The best companionship will be tetras , carp and the like that live in the higher parts of the water.


Fish are reluctant to breed in home aquariums, and there are no known methods of stimulating these fish to spawn. Nevertheless, sometimes there are information about fry in mature tanks and adult fish. Commercially available algae eaters come from breeding farms where special hormones are used for reproduction. Fish choose a large stone or root as their spawning site, but they do not care about the cleanliness of the egg laying site. The roe is tiny, transparent.


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