HomeFish encyclopediaRay-finned fishesCarpsMinnows or carpsRussian bitterling Russian bitterling (Acheilognathus asmussii) Scientific name: Acheilognathus asmussii Dybowski, 1872 The Russian bitterling (Acheilognathus asmussii) is a freshwater fish of the family Cyprinidae. In the aquarium it needs water at 18–22°C (64–72°F). Native range: Europe and Asia, Russia, Mongolia, China and Korea. Russian bitterling care at a glanceTemperature18–22°C (64–72°F) Species factsScientific nameAcheilognathus asmussiiFamilyCyprinidae (Minnows or carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length16.0Common length5.0EnvironmentFreshwater; benthopelagicClimateTemperateDistributionEurope and Asia: Russia, Mongolia, China and Korea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: public aquariumsResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Fec = 1,000) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026