HomeFish encyclopediaRay-finned fishesCatfishAirbreathing catfishesSlender walking catfish Slender walking catfish (Clarias nieuhofii) Scientific name: Clarias nieuhofii Valenciennes, 1840 The Slender walking catfish (Clarias nieuhofii) is a freshwater fish of the family Clariidae. Native range: Asia, Southeast Asia. BiologyOccurs in peats, lakes and lowland forest streams. Found in well shaded forest streams and swamps with acidic waters. A carnivorous species which feeds at night. Not seen in markets.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameClarias nieuhofiiFamilyClariidae (Airbreathing catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length50.0EnvironmentFreshwater; demersalClimateTropicalDistributionAsia: Southeast Asia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, 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