HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesDrab tonguefish Drab tonguefish (Symphurus melanurus) Scientific name: Symphurus melanurus Clark, 1936 The Drab tonguefish (Symphurus melanurus) is a brackish-water fish of the family Cynoglossidae. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 96-104; Anal spines: 0; Anal soft rays: 79 - 87; Vertebrae: 50 - 54Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSymphurus melanurusFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length18.6Common length15.0Depth range1–35 m (3–115 ft)EnvironmentMarine; brackish; demersal; depth range 1 - 35 mClimateTropicalDistributionEastern Pacific: Mexico to Ecuador. The Seychelles record in Smith & Smith 1963 was based on the type specimen of Symphurus seychellensis which was previously recorded as coming from Seychelles; the correct type locality for the species is northern Peru.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: of no interestResilienceMedium, 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