HomeFish encyclopediaRay-finned fishesLightfishes and DragonfishesLightfishesSlim lightfish Slim lightfish (Ichthyococcus elongatus) Scientific name: Ichthyococcus elongatus Imai, 1941 The Slim lightfish (Ichthyococcus elongatus) is a marine fish of the family Phosichthyidae. Native range: North Pacific, widely distributed in temperate waters. Southwest Pacific: New Zealand. Species factsScientific nameIchthyococcus elongatusFamilyPhosichthyidae (Lightfishes)OrderStomiiformes (Lightfishes and Dragonfishes)ClassActinopterygii (Ray-finned fishes)Maximum length13.0Depth range100–500 m (328–1640 ft)EnvironmentMarine; bathypelagic; depth range 100 - 500 mClimateDeep-waterDistributionNorth Pacific: widely distributed in temperate waters. Southwest Pacific: New Zealand.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming tmax>3) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026