HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesDeepwater tonguefish Deepwater tonguefish (Symphurus piger) Scientific name: Symphurus piger Goode & Bean, 1886 The Deepwater tonguefish (Symphurus piger) is a marine fish of the family Cynoglossidae. Native range: Western Atlantic, southern Florida, USA to the Lesser Antilles. BiologyOccurs in deep water; on relatively deep soft mud bottoms on the outer continental shelf and upper continental slope.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSymphurus pigerFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length15.0Depth range75–549 m (246–1801 ft)EnvironmentMarine; bathydemersal; depth range 75 - 549 m, usually 141 - 300 mClimateDeep-waterDistributionWestern Atlantic: southern Florida, USA to the Lesser Antilles.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming tmax>3) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026