HomeFish encyclopediaRay-finned fishesFlatfishesLarge-tooth floundersFringed flounder Fringed flounder (Etropus crossotus) Scientific name: Etropus crossotus Jordan & Gilbert, 1882 The Fringed flounder (Etropus crossotus) is a brackish-water fish of the family Paralichthyidae. In the aquarium it needs water at 11–31°C (52–88°F). Native range: Western Atlantic, Canada to Chesapeake Bay, USA to the Antilles and southern Brazil. Eastern Pacific: Baja California to Peru. Fringed flounder care at a glanceTemperature11–31°C (52–88°F) BiologyInhabits sandy and muddy bottoms. Common in estuaries. Feeds on big, benthic invertebrates and small fishes. Utilized fresh.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEtropus crossotusFamilyParalichthyidae (Large-tooth flounders)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length20.0Common length15.0Depth range0–65 m (0–213 ft)EnvironmentMarine; brackish; demersal; oceanodromous; depth range 0 - 65 m, usually 0 - 30 mClimateSubtropicalDistributionWestern Atlantic: Canada to Chesapeake Bay, USA to the Antilles and southern Brazil. Eastern Pacific: Baja California to Peru.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceHigh, minimum population doubling time less than 15 months (tmax=1.2; k >0.3) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026