Chinese Algae Eater Care Guide
Gyrinocheilus aymonieri is a Southeast Asian algae grazer that becomes territorial with age and reaches up to 28 cm.
Compiled by Aquairi from published sources · Published · Updated
Overview
Gyrinocheilus aymonieri, the Chinese algae eater, is a freshwater fish of the family Gyrinocheilidae, also known as the honey sucker or sucking loach. Despite its common name, it does not occur naturally in China; the name is misleading. It uses an inferior sucker-like mouth to graze algae from hard surfaces.
Taxonomy
- Family: Gyrinocheilidae
- Genus: Gyrinocheilus
- Scientific name: Gyrinocheilus aymonieri
Habitat
The species is native to the Mae Klong, Chao Phraya, middle and lower Mekong, and Dong Nai river basins across Thailand, Laos, Cambodia, and Vietnam. It inhabits flowing streams and tributaries with substrates of boulders, pebbles, gravel, and sand, where clear, shallow water promotes algae growth.
Tank requirements
- Minimum tank volume: 200 L (53 gal)
- Temperature: 22-28 °C (72-82 °F)
- pH: 6.5-7.5
- GH: 8-20 °dGH
- Lifespan: 5-10 years
Seriously Fish reports a maximum size of about 200-280 mm and an optimal temperature of 22-26 °C, with strong water flow and high dissolved oxygen recommended.
Diet
The Chinese algae eater is an omnivore that primarily grazes on algae and biofilm. According to Seriously Fish, it also consumes small crustaceans and insect larvae, and accepts frozen foods, vegetables, and plant matter. As it matures it grazes less algae and needs supplemental feeding.
Compatibility
Although sold as a small juvenile, the species becomes increasingly territorial and semi-aggressive as it grows, showing particular hostility toward similar-looking fishes. Seriously Fish notes it may attach to the flanks of larger tankmates to feed on their body mucus, so slow-moving and long-finned fish should be avoided in favor of active, fast tankmates.
Breeding Chinese Algae Eater
Overview
The Chinese Algae Eater (Gyrinocheilus aymonieri) is a common but problematic aquarium fish that is not bred in home aquaria. It is instead farmed for the trade in large numbers with the aid of hormones, so practical home breeding is effectively not an option.
Sexing
Young fish cannot be accurately sexed. Sexually mature females develop noticeably thicker bodies than males, and adult males in spawning condition develop noticeable tubercles on the snout.
Behaviour & Compatibility Warning
The species becomes increasingly territorial as it grows and can display particularly high levels of aggression toward similar-looking fishes. It may attach itself to the flanks of larger tankmates to feed on their body mucus, and in groups it develops a distinct pecking order in which weaker individuals are targeted. These traits make it a poor candidate for a community breeding setup.
Common Challenges
Because there are no reliable home-spawning triggers and the trade depends on hormone-induced farm breeding, hobbyists should not expect to reproduce this fish at home. The combination of late aggression and mucus-feeding behaviour further complicates keeping a breeding group.