HomeFish encyclopediaRay-finned fishesFlatfishesLarge-tooth floundersCortez flounder Cortez flounder (Paralichthys aestuarius) Scientific name: Paralichthys aestuarius Gilbert & Scofield, 1898 The Cortez flounder (Paralichthys aestuarius) is a brackish-water fish of the family Paralichthyidae. Native range: Eastern Central Pacific, Baja California, Mexico and the Gulf of California. BiologyInhabits soft bottoms, from estuaries and up to a depth of 44 m. Utilized fresh.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameParalichthys aestuariusFamilyParalichthyidae (Large-tooth flounders)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length58.3Common length45.0Depth range44 m (144 ft)EnvironmentMarine; brackish; demersal; depth range ? - 44 mClimateSubtropicalDistributionEastern Central Pacific: Baja California, Mexico and the Gulf of California.Conservation status (IUCN)Data deficient (DD)Threat 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