HomeFish encyclopediaRay-finned fishesFlatfishesRighteye floundersAmerican smooth flounder American smooth flounder (Liopsetta putnami) Scientific name: Liopsetta putnami Gill, 1864 The American smooth flounder (Liopsetta putnami) is a brackish-water fish of the family Pleuronectidae. Native range: Northwest Atlantic, Ungava Bay in Quebec, Canada to Rhode Island in USA. BiologyInhabits inshore waters, shallow estuaries, river mouths and sheltered bays. Benthic species. Feeds on worms, crustaceans and molluscsSource: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameLiopsetta putnamiFamilyPleuronectidae (Righteye flounders)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length30.0Depth range27 m (89 ft)EnvironmentMarine; brackish; demersal; depth range ? - 27 mClimateTemperateDistributionNorthwest Atlantic: Ungava Bay in Quebec, Canada to Rhode Island in USA.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming tm=2-4; Fec=4,581-51,854) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026