HomeFish encyclopediaRay-finned fishesEels and MoraysFreshwater eelsHighlands long-finned eel Highlands long-finned eel (Anguilla interioris) Scientific name: Anguilla interioris Whitley, 1938 The Highlands long-finned eel (Anguilla interioris) is a freshwater fish of the family Anguillidae. Native range: Oceania, known only from the eastern half of New Guinea. BiologyVertebrae: 100 - 106. Most similar to Anguilla celebensis and Anguilla megastoma. It can be distinguished form A. celebensis by the relative length of the dorsal fin and from A. megastoma by the number of vertebrae. Distance between verticals through anus and origin of dorsal-fin origin 11-15 of total length.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAnguilla interiorisFamilyAnguillidae (Freshwater eels)OrderAnguilliformes (Eels and Morays)ClassActinopterygii (Ray-finned fishes)Maximum length80.0EnvironmentMarine; freshwater; brackish; demersal; catadromousClimateTropicalDistributionOceania: known only from the eastern half of New Guinea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceVery 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