Oreoleuciscus angusticephalus

{{Short description|Species of fish}}

{{Speciesbox

|image =

|taxon = Oreoleuciscus angusticephalus

|authority = Bogutskaya, 2001

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Oreoleuciscus angusticephalus, the narrow-headed Altai osman, is a species of freshwater ray-finned fish belonging to the family Leuciscidae, which contains the daces, chubs, true minnows and related species.{{Cof genus|genus=Oreoleuciscus|access-date=21 May 2025}} It is endemic to Mongolia and has a maximum standard length of {{convert|23.8|cm|in}}. Its young feed on plankton while adults feed predominantly on fish. It has a lifespan of over 40 years and takes 8–9 years to mature.{{FishBase|Oreoleuciscus|angusticephalus|month=February|year=2025}}