HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesTrewavas' tonguefish Trewavas' tonguefish (Symphurus trewavasae) Scientific name: Symphurus trewavasae Chabanaud, 1948 The Trewavas' tonguefish (Symphurus trewavasae) is a marine fish of the family Cynoglossidae. Native range: Southwest Atlantic, southeastern Brazil to central Argentina. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 86-93; Anal spines: 0; Anal soft rays: 72 - 78Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSymphurus trewavasaeFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length13.9Depth range7–190 m (23–623 ft)EnvironmentMarine; demersal; depth range 7 - 190 m, usually 40 - 100 mClimateTropicalDistributionSouthwest Atlantic: southeastern Brazil to central Argentina.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