HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesHalfstriped tonguefish Halfstriped tonguefish (Symphurus prolatinaris) Scientific name: Symphurus prolatinaris Munroe, Nizinski & Mahadeva, 1991 The Halfstriped tonguefish (Symphurus prolatinaris) is a marine fish of the family Cynoglossidae. Native range: Eastern Central Pacific, Mexico to Peru. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 102-112; Anal spines: 0; Anal soft rays: 85 - 93; Vertebrae: 54 - 58Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSymphurus prolatinarisFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length16.1Common length13.0Depth range9–162 m (30–531 ft)EnvironmentMarine; demersal; depth range 9 - 162 m, usually 13 - 42 mClimateTropicalDistributionEastern Central Pacific: Mexico to Peru.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessResilienceMedium, 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