HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesDuskycheek tonguefish Duskycheek tonguefish (Symphurus plagusia) Scientific name: Symphurus plagusia Bloch & Schneider, 1801 The Duskycheek tonguefish (Symphurus plagusia) is a brackish-water fish of the family Cynoglossidae. Native range: Western Atlantic, Bahamas and the Caribbean to Rio de Janeiro, Brazil. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 89-99; Anal spines: 0; Anal soft rays: 75 - 84Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSymphurus plagusiaFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length25.0Common length20.0Depth range1–75 m (3–246 ft)EnvironmentMarine; brackish; demersal; depth range 1 - 75 m, usually ? - 10 mClimateTropicalDistributionWestern Atlantic: Bahamas and the Caribbean to Rio de Janeiro, Brazil.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