HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesCalifornia tonguefish California tonguefish (Symphurus atricaudus) Scientific name: Symphurus atricaudus Jordan & Gilbert, 1880 The California tonguefish (Symphurus atricaudus) is a marine fish of the family Cynoglossidae. Native range: Eastern Central Pacific, California, USA to the Gulf of California. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 94-102; Anal spines: 0; Anal soft rays: 77 - 83; Vertebrae: 50 - 53Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSymphurus atricaudusFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length21.0Common length13.0Depth range2–201 m (7–659 ft)EnvironmentMarine; demersal; depth range 2 - 201 m, usually 30 - 80 mClimateSubtropicalDistributionEastern Central Pacific: California, USA to the Gulf of California.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: minor commercialResilienceMedium, 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