HomeFish encyclopediaRay-finned fishesSmeltsSlickheadsBrown slickhead Brown slickhead (Bajacalifornia calcarata) Scientific name: Bajacalifornia calcarata Weber, 1913 The Brown slickhead (Bajacalifornia calcarata) is a marine fish of the family Alepocephalidae. Native range: Eastern Atlantic, in tropical waters. Indo-West Pacific: widely distributed from Gulf of Aden to the western Pacific. Species factsScientific nameBajacalifornia calcarataFamilyAlepocephalidae (Slickheads)OrderOsmeriformes (Smelts)ClassActinopterygii (Ray-finned fishes)Maximum length38.0Depth range350–1100 m (1148–3609 ft)EnvironmentMarine; bathypelagic; depth range 350 - 1100 mClimateDeep-waterDistributionEastern Atlantic: in tropical waters. Indo-West Pacific: widely distributed from Gulf of Aden to the western Pacific.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 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