HomeFish encyclopediaRay-finned fishesEels and MoraysFreshwater eelsMottled eel Mottled eel (Anguilla nebulosa) Scientific name: Anguilla nebulosa McClelland, 1844 The Mottled eel (Anguilla nebulosa) is a freshwater fish of the family Anguillidae. Native range: Indian Ocean, East Africa to Sumatra, Indonesia. BiologyAdults rarely in coastal swamps, with a wide temperature tolerance. Shy and secretive, and is found in greatest abundance in mud substrates of dry zones. Most often found in deep rock pools in rivers in the wet zones. Probably feeds on small fish, crustaceans, worms and mollusks. Species is too large for use in the aquarium trade, however is a welcome food fish when caught.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAnguilla nebulosaFamilyAnguillidae (Freshwater eels)OrderAnguilliformes (Eels and Morays)ClassActinopterygii (Ray-finned fishes)Maximum length121Depth range3–10 m (10–33 ft)EnvironmentMarine; freshwater; brackish; demersal; catadromous; depth range 3 - 10 mClimateTropicalDistributionIndian Ocean: East Africa to Sumatra, Indonesia.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: subsistence fisheriesResilienceVery Low, minimum population doubling time more than 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