HomeFish encyclopediaRay-finned fishesLightfishes and DragonfishesMarine hatchetfishesEmperor seamount lightfish Emperor seamount lightfish (Maurolicus imperatorius) Scientific name: Maurolicus imperatorius Parin & Kobyliansky, 1993 The Emperor seamount lightfish (Maurolicus imperatorius) is a marine fish of the family Sternoptychidae. Native range: North Pacific, Known at seamounts of northwestern Pacific and Hawaiian Ridges. BiologyVertebrae: 32 - 34. AC photophores23-26, usually 24. Head 29-33% SL, eye 9.5-11% SL, upper jaw 15.5-19% SL, maximum body depth at pectoral fin base 21-24% SL. Stomach lightly pigmented, hind portion of intestine not pigmented.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMaurolicus imperatoriusFamilySternoptychidae (Marine hatchetfishes)OrderStomiiformes (Lightfishes and Dragonfishes)ClassActinopterygii (Ray-finned fishes)Maximum length5.1Depth range0–400 m (0–1312 ft)EnvironmentMarine; bathypelagic; depth range 0 - 400 mClimateDeep-waterDistributionNorth Pacific: Known at seamounts of northwestern Pacific and Hawaiian Ridges.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