HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesNorthern tonguefish Northern tonguefish (Symphurus pusillus) Scientific name: Symphurus pusillus Goode & Bean, 1885 The Northern tonguefish (Symphurus pusillus) is a marine fish of the family Cynoglossidae. Native range: Northwest Atlantic, New York (probably Massachusetts) to North Carolina in USA. BiologyInhabits bays and shallow coastal waters; with mud substrates. Sexual maturity occurs at approximately 4 cm SL.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSymphurus pusillusFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length7.5Depth range102–233 m (335–764 ft)EnvironmentMarine; demersal; depth range 102 - 233 m, usually 115 - 233 mClimateTemperateDistributionNorthwest Atlantic: New York (probably Massachusetts) to North Carolina in USA.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