HomeFish encyclopediaRay-finned fishesCatfishEeltail catfishesDarkfin eel catfish Darkfin eel catfish (Plotosus limbatus) Scientific name: Plotosus limbatus Valenciennes, 1840 The Darkfin eel catfish (Plotosus limbatus) is a freshwater fish of the family Plotosidae. Native range: Western Indian Ocean, ranging from the Madras and Malabar coasts of India to the east coast of Africa. Reaches as far south as Knysna, South Africa. BiologyOccurs in estuaries and along open coasts. Juveniles form dense aggregations. Feeds on crustaceans, mollusks, and fishes. Dorsal and pelvic fins are venomous.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePlotosus limbatusFamilyPlotosidae (Eeltail catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length41.0Common length30.0EnvironmentMarine; freshwater; brackish; demersal; amphidromousClimateTropicalDistributionWestern Indian Ocean: ranging from the Madras and Malabar coasts of India to the east coast of Africa. Reaches as far south as Knysna, South Africa.Conservation status (IUCN)Not EvaluatedThreat to humansVenomousUsesFisheries: 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