HomeFish encyclopediaRay-finned fishesLightfishes and DragonfishesMarine hatchetfishesNorth Pacific lightfish North Pacific lightfish (Maurolicus japonicus) Scientific name: Maurolicus japonicus Ishikawa, 1915 The North Pacific lightfish (Maurolicus japonicus) is a marine fish of the family Sternoptychidae. BiologyDorsal soft rays (total): 10-11; Anal soft rays: 21 - 24; Vertebrae: 32 - 34Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMaurolicus japonicusFamilySternoptychidae (Marine hatchetfishes)OrderStomiiformes (Lightfishes and Dragonfishes)ClassActinopterygii (Ray-finned fishes)Maximum length5.0Depth range50–400 m (164–1312 ft)EnvironmentMarine; bathypelagic; depth range 50 - 400 mClimateDeep-waterDistributionNorthwest Pacific: Toyama Bay, Pacific coast of Honshu southward to adjacent waters of Ryukyu Islands and Ogasawara Islands in Japan. Eastern Central Pacific: Hawaii.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming Fec SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026