HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesLargescale tonguesole Largescale tonguesole (Cynoglossus arel) Scientific name: Cynoglossus arel Bloch & Schneider, 1801 The Largescale tonguesole (Cynoglossus arel) is a freshwater fish of the family Cynoglossidae. Native range: Indo-West Pacific, Persian Gulf to Sri Lanka and Indonesia, north to southern Japan. Reported occurrence of this species from Niue should be verified. BiologyInhabits muddy and sandy bottoms of the continental shelf down to 125 m. Enters estuaries and tidal rivers. Feeds predominantly on bottom-living invertebrates. Marketed mostly fresh and frozen; also dried-salted.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCynoglossus arelFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length40.0Common length30.0Depth range9–125 m (30–410 ft)EnvironmentMarine; freshwater; brackish; demersal; amphidromous; depth range 9 - 125 mClimateTropicalDistributionIndo-West Pacific: Persian Gulf to Sri Lanka and Indonesia, north to southern Japan. Reported occurrence of this species from Niue should be verified.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (K=0.24) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026