HomeFish encyclopediaRay-finned fishesSmeltsDeep-sea smeltsStout blacksmelt Stout blacksmelt (Pseudobathylagus milleri) Scientific name: Pseudobathylagus milleri Jordan & Gilbert, 1898 The Stout blacksmelt (Pseudobathylagus milleri) is a marine fish of the family Bathylagidae. Native range: North Pacific, Iwate Prefecture, Japan to the Bering Sea and to British Columbia, Canada and California, USA. BiologyDorsal spines: 0; Dorsal soft rays: 7-9; Anal spines: 0; Anal soft rays: 23 - 27; Vertebrae: 50 - 54. Adipose fin far back on caudal peduncle, relatively large and long; pectorals rather small. Color black to dark brown.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePseudobathylagus milleriFamilyBathylagidae (Deep-sea smelts)OrderOsmeriformes (Smelts)ClassActinopterygii (Ray-finned fishes)Maximum length16.5Depth range0–6600 m (0–21654 ft)EnvironmentMarine; bathypelagic; depth range 0 - 6600 mClimateDeep-waterDistributionNorth Pacific: Iwate Prefecture, Japan to the Bering Sea and to British Columbia, Canada and California, USA.Conservation status (IUCN)Least Concern (LC)Threat 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