HomeFish encyclopediaRay-finned fishesCarpsMinnows or carpsNarrow-headed Altai osman Narrow-headed Altai osman (Oreoleuciscus angusticephalus) Scientific name: Oreoleuciscus angusticephalus Bogutskaya, 2001 The Narrow-headed Altai osman (Oreoleuciscus angusticephalus) is a freshwater fish of the family Cyprinidae. Native range: Asia, endemic to Mongolia. BiologyApparently similar to other piscivirous form of Altai osman with individuals having a long life duration (more than 40 years); reaching maturity at 8-9 years at body length of 20-24 cm. The young feed on plankton with fish as predominant food in the diet of the adults. Spawning occurs in May and June, with eggs laid on the sand, pebble, vegetation (spawning time and place partly coincide with O. potanini.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOreoleuciscus angusticephalusFamilyCyprinidae (Minnows or carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length23.8EnvironmentFreshwater; benthopelagicClimateTemperateDistributionAsia: endemic to Mongolia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026