HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesRoughscale tonguesole Roughscale tonguesole (Cynoglossus lida) Scientific name: Cynoglossus lida Bleeker, 1851 The Roughscale tonguesole (Cynoglossus lida) is a marine fish of the family Cynoglossidae. Native range: Indo-West Pacific, East Africa, Pakistan and India to the Malay Archipelago and the Philippines. Species factsScientific nameCynoglossus lidaFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length21.3Depth range24–27 m (79–89 ft)EnvironmentMarine; demersal; depth range 24 - 27 mClimateTropicalDistributionIndo-West Pacific: East Africa, Pakistan and India to the Malay Archipelago and the Philippines.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 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