HomeFish encyclopediaRay-finned fishesSmeltsDeep-sea smeltsBigscale deepsea smelt Bigscale deepsea smelt (Melanolagus bericoides) Scientific name: Melanolagus bericoides Borodin, 1929 The Bigscale deepsea smelt (Melanolagus bericoides) is a marine fish of the family Bathylagidae. Native range: Atlantic, Indian and Pacific, widely distributed in tropical and subtropical waters. Eastern Pacific: California Current region. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 9-12; Anal spines: 0; Anal soft rays: 18 - 23; Vertebrae: 48 - 54. More than two eyes; anal fin base longer than caudal peduncle; swim bladder absent; branchiostegal rays, two on each side; pectoral fins originating close to ventral surface of the body. Head and body black when fresh; scale pocket markings jet black. Branchiostegal rays: 2. Also.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMelanolagus bericoidesFamilyBathylagidae (Deep-sea smelts)OrderOsmeriformes (Smelts)ClassActinopterygii (Ray-finned fishes)Maximum length20.0Depth range0–1700 m (0–5577 ft)EnvironmentMarine; bathypelagic; depth range 0 - 1700 mClimateDeep-waterDistributionAtlantic, Indian and Pacific: widely distributed in tropical and subtropical waters. Eastern Pacific: California Current region.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceLow, 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