Gyrinocheilus is the single genus in the family Gyrinocheilidae, a family of small Southeast Asian cypriniform fishes that live in fast-flowing freshwater mountain streams. The species in this genus are commonly called algae eaters. They hold on to fixed objects using a sucker-like mouth, and, despite the name, feed on a wide range of detritus, rather than simply on algae. A "golden" variety of G. aymonieri, the Chinese algae eater or "sucking loach", can be found in many pet shops and fish farms.
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Gyrinocheilus is the single genus in the family Gyrinocheilidae, a family of small Southeast Asian cypriniform fishes that live in fast-flowing freshwater mountain streams. The species in this genus are commonly called algae eaters. They hold on to fixed objects using a sucker-like mouth, and, despite the name, feed on a wide range of detritus, rather than simply on algae. A "golden" variety of G. aymonieri, the Chinese algae eater or "sucking loach", can be found in many pet shops and fish farms.
== Sucker == The mouths of these fish have developed into a suckermouth, which allows the fish to cling onto objects in the fast-moving water of their habitat. They therefore stay close to the bottom, where their primary food, algae, is more readily available. Uniquely among fish, members of this family have gill slits with two openings each. Water enters through one opening, and leaves through the other. This allows the fish to breathe without having to take water in through the mouth, which is in use to cling to surfaces.
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