HomeFish encyclopediaRay-finned fishesCarpsRiver loachesSucker-belly loach Sucker-belly loach (Pseudogastromyzon myersi) Scientific name: Pseudogastromyzon myersi Herre, 1932 The Sucker-belly loach (Pseudogastromyzon myersi) is a freshwater fish of the family Balitoridae. Native range: Asia, known to be endemic to Guangdong Province, China, but reported from Hong Kong. BiologyInhabits rapid flowing streams. Feeds on periphytic algae and detritus on rock surfaces.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePseudogastromyzon myersiFamilyBalitoridae (River loaches)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length6.0Common length2.9EnvironmentFreshwater; brackish; benthopelagicClimateSubtropicalDistributionAsia: known to be endemic to Guangdong Province, China, but reported from Hong Kong.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026