Alburnus chalcoides, Danube Bleak or Caspian Shemaya, is a cyprinid found in the Caspian, Aral, and Black Sea drainages in eastern Europe and western Asia (Afghanistan, Armenia, Azerbaijan, Georgia, Iran, Kazakhstan, Turkey, Uzbekistan, Austria, Bulgaria, Czech Republic, Germany, Greece, Hungary, Moldova, Romania, Russia, Serbia, Slovakia, Switzerland, and Ukraine). It is harvested commercially in parts of its native range. A. chalcoides has been reported as established outside its native range within Turkey, where the government has stocked the species into reservoirs. A. chalcoides has also been introduced to China for aquaculture, but no reports were found to suggest that it has become established in the wild in China. There is no information available on impacts or lack thereof from nonnative populations in Turkey. The history of invasiveness is classified as Data Deficient. The climate match for the contiguous United States was high, with the highest matches occurring in the Rocky Mountains, parts of the Southwest, the Great Lakes region, the central Appalachian Mountains, and around Lake Champlain. The certainty of assessment was low due to the limited information regarding this species history of introduction and lack of information regarding impacts. The overall risk for this species is Uncertain.
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