HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesDevil's tonguefish Devil's tonguefish (Symphurus diabolicus) Scientific name: Symphurus diabolicus Mahadeva & Munroe, 1990 The Devil's tonguefish (Symphurus diabolicus) is a marine fish of the family Cynoglossidae. Native range: Southeast Pacific, known from a single specimen taken west of 0?46'S, 89?42'W. Reported occurrences from the Ecuador-Galapagos islands. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 109; Anal spines: 0; Anal soft rays: 94; Vertebrae: 58Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSymphurus diabolicusFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length11.3Depth range496–501 m (1627–1644 ft)EnvironmentMarine; bathydemersal; depth range 496 - 501 mClimateDeep-waterDistributionSoutheast Pacific: known from a single specimen taken west of 0?46'S, 89?42'W. Reported occurrences from the Ecuador-Galapagos islands.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceHigh, 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