HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesSpottedfin tonguefish Spottedfin tonguefish (Symphurus diomedeanus) Scientific name: Symphurus diomedeanus Goode & Bean, 1885 The Spottedfin tonguefish (Symphurus diomedeanus) is a marine fish of the family Cynoglossidae. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 90-92; Anal spines: 0; Anal soft rays: 73 - 77Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSymphurus diomedeanusFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length22.0Common length18.0Depth range6–263 m (20–863 ft)EnvironmentMarine; reef-associated; depth range 6 - 263 m, usually 21 - 80 mClimateSubtropicalDistributionWestern Atlantic: Canada to north of Cape Hatteras, North Carolina through the Gulf of Mexico and the Caribbean Sea, inner continental shelf of South America to about Isla de Flores, Uruguay.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of potential 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