HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesTongue sole Tongue sole (Cynoglossus semilaevis) Scientific name: Cynoglossus semilaevis G?nther, 1873 The Tongue sole (Cynoglossus semilaevis) is a freshwater fish of the family Cynoglossidae. Native range: Asia, China. Occurs in the Yellow Sea and the East China Sea. BiologyCarnivorous, feeds mainly on benthic crustaceans and fish.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCynoglossus semilaevisFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length57.1EnvironmentMarine; freshwater; brackish; demersalClimateSubtropicalDistributionAsia: China. Occurs in the Yellow Sea and the East China Sea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (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