HomeFish encyclopediaRay-finned fishesCarpsMinnows or carpsDwarf Altai osman Dwarf Altai osman (Oreoleuciscus humilis) Scientific name: Oreoleuciscus humilis Warpachowski, 1889 The Dwarf Altai osman (Oreoleuciscus humilis) is a freshwater fish of the family Cyprinidae. In the aquarium it needs water at 10–18°C (50–64°F). Native range: Asia, Mongolia. Former USSR: Russia. Dwarf Altai osman care at a glanceTemperature10–18°C (50–64°F) Species factsScientific nameOreoleuciscus humilisFamilyCyprinidae (Minnows or carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length20.0Common length14.0EnvironmentFreshwater;; pH range: 7.2 - 8.2; dH range: 10 - 30 demersalClimateTemperateDistributionAsia: Mongolia. Former USSR: Russia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (tm=6; tmax=15) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026