HomeFish encyclopediaRay-finned fishesFlatfishesTonguefishesBloch's tonguesole Bloch's tonguesole (Paraplagusia blochii) Scientific name: Paraplagusia blochii Bleeker, 1851 The Bloch's tonguesole (Paraplagusia blochii) is a brackish-water fish of the family Cynoglossidae. Native range: Indo-West Pacific, southern Oman to Papua New Guinea, north to Taiwan and Japan. BiologyDorsal soft rays (total): 77-105; Anal soft rays: 70 - 82. Caudal vertebrae 36-39; mid-lateral line scales 73-96.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameParaplagusia blochiiFamilyCynoglossidae (Tonguefishes)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length22.0Depth range7–80 m (23–262 ft)EnvironmentMarine; brackish; demersal; depth range 7 - 80 mClimateTropicalDistributionIndo-West Pacific: southern Oman to Papua New Guinea, north to Taiwan and Japan.Conservation status (IUCN)Not EvaluatedThreat 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