HomeFish encyclopediaRay-finned fishesCatfishSea catfishesFlathead sea catfish Flathead sea catfish (Notarius planiceps) Scientific name: Notarius planiceps Steindachner, 1877 The Flathead sea catfish (Notarius planiceps) is a brackish-water fish of the family Ariidae. Native range: Central America, Pacific draining rivers and estuaries from Mexico to Panama. BiologyFound in coastal waters, over sandy bottoms. May enter inland waters. Feeds on benthic invertebrates. Marketed fresh.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameNotarius planicepsFamilyAriidae (Sea catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length60.0EnvironmentMarine; brackish; demersalClimateTropicalDistributionCentral America: Pacific draining rivers and estuaries from Mexico to Panama.Conservation status (IUCN)Least Concern (LC)Threat to humansTraumatogenicUsesFisheries: commercialResilienceLow, minimum population doubling time 4.5 - 14 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