HomeFish encyclopediaRay-finned fishesCatfishSea catfishesThinspine sea catfish Thinspine sea catfish (Plicofollis tenuispinis) Scientific name: Plicofollis tenuispinis Day, 1877 The Thinspine sea catfish (Plicofollis tenuispinis) is a brackish-water fish of the family Ariidae. Native range: Western Indian Ocean, Mozambique and Persian Gulf to Sri Lanka. BiologyFound in coastal waters down to a depth of about 50 m. Enters brackish waters. Feeds mainly on invertebrates and small fishes. Caught mainly with bagnets, dipnets, bamboo stake traps and on hook and line.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePlicofollis tenuispinisFamilyAriidae (Sea catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length36.0Common length23.0Depth range20–50 m (66–164 ft)EnvironmentMarine; brackish; demersal; amphidromous; depth range 20 - 50 mClimateTropicalDistributionWestern Indian Ocean: Mozambique and Persian Gulf to Sri Lanka.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