HomeFish encyclopediaRay-finned fishesFlatfishesRighteye floundersAlcock's narrow-body righteye flounder Alcock's narrow-body righteye flounder (Poecilopsetta praelonga) Scientific name: Poecilopsetta praelonga Alcock, 1894 The Alcock's narrow-body righteye flounder (Poecilopsetta praelonga) is a marine fish of the family Pleuronectidae. Native range: Indo-West Pacific, Indian Ocean, Taiwan, and Timor; also from northwestern Australia. BiologyBody depth 3.8 to 4 times in SL. Upper-jaw length 3.6 to 3.7 times in head length (Ref 12933).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePoecilopsetta praelongaFamilyPleuronectidae (Righteye flounders)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length17.5Depth range216–714 m (709–2343 ft)EnvironmentMarine; bathydemersal; depth range 216 - 714 mClimateDeep-waterDistributionIndo-West Pacific: Indian Ocean, Taiwan, and Timor; also from northwestern Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming tmax>3) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026