HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesMacau sole Macau sole (Cynoglossus trulla) Scientific name: Cynoglossus trulla Cantor, 1849 The Macau sole (Cynoglossus trulla) is a freshwater fish of the family Cynoglossidae. Native range: Western Central Pacific, Indonesia, Malaysia, Gulf of Thailand, and the South China Sea. BiologyBlind side with only a medial lateral line. Caudal fin usually with 12 rays (Ref 9895).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCynoglossus trullaFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length45.0Depth range10 m (33 ft)EnvironmentMarine; freshwater; brackish; demersal; depth range ? - 10 mClimateTropicalDistributionWestern Central Pacific: Indonesia, Malaysia, Gulf of Thailand, and the South 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