HomeFish encyclopediaRay-finned fishesLanternfishesLanternfishesLongfin lampfish Longfin lampfish (Lampanyctus steinbecki) Scientific name: Lampanyctus steinbecki Bolin, 1939 The Longfin lampfish (Lampanyctus steinbecki) is a marine fish of the family Myctophidae. Native range: Eastern Pacific, 37?N-30?S. Indian Ocean: 0?-14?S. Western Pacific: Papua New Guinea. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 12-14; Anal spines: 0; Anal soft rays: 16 - 19; Vertebrae: 34 - 36Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameLampanyctus steinbeckiFamilyMyctophidae (Lanternfishes)OrderMyctophiformes (Lanternfishes)ClassActinopterygii (Ray-finned fishes)Maximum length3.8Depth range80–100 m (262–328 ft)EnvironmentMarine; bathypelagic; oceanodromous; depth range 80 - 100 mClimateDeep-waterDistributionEastern Pacific: 37?N-30?S. Indian Ocean: 0?-14?S. Western Pacific: Papua New Guinea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (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