HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesElongate tonguefish Elongate tonguefish (Symphurus elongatus) Scientific name: Symphurus elongatus G?nther, 1868 The Elongate tonguefish (Symphurus elongatus) is a brackish-water fish of the family Cynoglossidae. Native range: Eastern Central Pacific, Mexico to Ecuador. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 99-107; Anal spines: 0; Anal soft rays: 83 - 90; Vertebrae: 53 - 56Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSymphurus elongatusFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length15.8Common length13.5Depth range1–100 m (3–328 ft)EnvironmentMarine; brackish; demersal; depth range 1 - 100 m, usually 1 - 40 mClimateTropicalDistributionEastern Central Pacific: Mexico to Ecuador.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: of no 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