HomeFish encyclopediaRay-finned fishesLanternfishesLanternfishesPacific headlightfish Pacific headlightfish (Diaphus pacificus) Scientific name: Diaphus pacificus Parr, 1931 The Pacific headlightfish (Diaphus pacificus) is a marine fish of the family Myctophidae. Native range: Southwest Pacific, New Zealand. Eastern Central Pacific: from about 25?N to 15?S. Northwest Pacific: Larvae collected from Taiwan Strait. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 13-15; Anal spines: 0; Anal soft rays: 11 - 13; Vertebrae: 31 - 33. Branchiostegal rays: 13-15.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameDiaphus pacificusFamilyMyctophidae (Lanternfishes)OrderMyctophiformes (Lanternfishes)ClassActinopterygii (Ray-finned fishes)EnvironmentMarine; bathypelagicClimateDeep-waterDistributionSouthwest Pacific: New Zealand. Eastern Central Pacific: from about 25?N to 15?S. Northwest Pacific: Larvae collected from Taiwan Strait.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