HomeFish encyclopediaRay-finned fishesSmeltsLeptochilichthyidsSmallscale smoothhead Smallscale smoothhead (Leptochilichthys microlepis) Scientific name: Leptochilichthys microlepis Machida & Shiogaki, 1988 The Smallscale smoothhead (Leptochilichthys microlepis) is a marine fish of the family Leptochilichthyidae. Native range: Northwest Pacific, off the coast of Aomori Prefecture, northernmost district of Honshu, Japan. Western Central Pacific: off North West Cape, Western Australia. Species factsScientific nameLeptochilichthys microlepisFamilyLeptochilichthyidae (Leptochilichthyids)OrderOsmeriformes (Smelts)ClassActinopterygii (Ray-finned fishes)Maximum length30.3Depth range724–726 m (2375–2382 ft)EnvironmentMarine; bathydemersal; depth range 724 - 726 mClimateDeep-waterDistributionNorthwest Pacific: off the coast of Aomori Prefecture, northernmost district of Honshu, Japan. Western Central Pacific: off North West Cape, Western Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026