HomeFish encyclopediaRay-finned fishesCatfishSea catfishesSquirrelheaded catfish Squirrelheaded catfish (Arius microcephalus) Scientific name: Arius microcephalus Bleeker, 1855 The Squirrelheaded catfish (Arius microcephalus) is a brackish-water fish of the family Ariidae. Native range: Western Pacific, Eastern Thailand and throughout Borneo. BiologyFound in inshore and turbid brackish waters and tidal reaches of rivers. Probably feeding on mollusks or thick-shelled crustaceans.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameArius microcephalusFamilyAriidae (Sea catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length60.0EnvironmentMarine; brackish; benthopelagicClimateTropicalDistributionWestern Pacific: Eastern Thailand and throughout Borneo.Conservation status (IUCN)Not EvaluatedThreat to humansTraumatogenicResilienceLow, 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