HomeFish encyclopediaRay-finned fishesCatfishSea catfishesFlatmouth sea catfish Flatmouth sea catfish (Plicofollis platystomus) Scientific name: Plicofollis platystomus Day, 1877 The Flatmouth sea catfish (Plicofollis platystomus) is a brackish-water fish of the family Ariidae. Native range: Indian Ocean, India and Sri Lanka. Also reported from Pakistan, Myanmar and Bangladesh. BiologyOccurs in coastal waters and estuaries. Feeds mainly on invertebrates. Caught mainly with bottom trawls, stake traps, shore seines, set bagnets and on hook and line. An important food fish.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePlicofollis platystomusFamilyAriidae (Sea catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length31.0EnvironmentMarine; brackish; demersal; amphidromousClimateTropicalDistributionIndian Ocean: India and Sri Lanka. Also reported from Pakistan, Myanmar and Bangladesh.Conservation status (IUCN)Least Concern (LC)Threat to humansTraumatogenicUsesFisheries: 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