HomeFish encyclopediaRay-finned fishesFlatfishesCrested floundersLongfinned flounder Longfinned flounder (Samariscus longimanus) Scientific name: Samariscus longimanus Norman, 1927 The Longfinned flounder (Samariscus longimanus) is a marine fish of the family Samaridae. Native range: Indo-West Pacific, India, Sri Lanka, Taiwan, and the Philippines. BiologyDorsal soft rays (total): 66-71; Anal soft rays: 50 - 54; Vertebrae: 38 - 39Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSamariscus longimanusFamilySamaridae (Crested flounders)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length12.0Depth range185–333 m (607–1093 ft)EnvironmentMarine; bathydemersal; depth range 185 - 333 mClimateDeep-waterDistributionIndo-West Pacific: India, Sri Lanka, Taiwan, and the Philippines.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026