HomeFish encyclopediaRay-finned fishesSmeltsSlickheadsEucla slickhead Eucla slickhead (Rouleina eucla) Scientific name: Rouleina eucla Whitley, 1940 The Eucla slickhead (Rouleina eucla) is a marine fish of the family Alepocephalidae. Native range: Western Central Pacific. Species factsScientific nameRouleina euclaFamilyAlepocephalidae (Slickheads)OrderOsmeriformes (Smelts)ClassActinopterygii (Ray-finned fishes)Depth range900–1050 m (2953–3445 ft)EnvironmentMarine; bathypelagic; depth range 900 - 1050 mClimateDeep-waterDistributionWestern Central Pacific.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