HomeFish encyclopediaRay-finned fishesCatfishSea catfishesMayan sea catfish Mayan sea catfish (Ariopsis assimilis) Scientific name: Ariopsis assimilis G?nther, 1864 The Mayan sea catfish (Ariopsis assimilis) is a freshwater fish of the family Ariidae. Native range: Central America, Mexico, Belize, Honduras, Guatemala, Nicaragua, Costa Rica and Panama. Species factsScientific nameAriopsis assimilisFamilyAriidae (Sea catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length35.0Common length25.0EnvironmentFreshwater; brackish; demersalClimateTropicalDistributionCentral America: Mexico, Belize, Honduras, Guatemala, Nicaragua, Costa Rica and Panama.Conservation status (IUCN)Not EvaluatedThreat to humansTraumatogenicUsesFisheries: 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