HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesThreeband tonguesole Threeband tonguesole (Symphurus trifasciatus) Scientific name: Symphurus trifasciatus Alcock, 1894 The Threeband tonguesole (Symphurus trifasciatus) is a marine fish of the family Cynoglossidae. Native range: Indian Ocean, Gulf of Oman, Bay of Bengal off Madras Coast, off west coast of India, Gulf of Mana?r, and off Ceylon (Sri Lanka). BiologyMature female specimens with elongate ovaries at sizes 9.26 and 9.35 cm SL were examined. Nothing is known of its life history.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSymphurus trifasciatusFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length11.6Depth range220–737 m (722–2418 ft)EnvironmentMarine; bathydemersal; depth range 220 - 737 mClimateDeep-waterDistributionIndian Ocean: Gulf of Oman, Bay of Bengal off Madras Coast, off west coast of India, Gulf of Mana?r, and off Ceylon (Sri Lanka).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