Asia: endemic to the Amur basin, occurring in the middle and lower reaches of the Amur, Ussuri River and Lake Khanka, Amur estuary and southern Sea of Okhotsk
Definition: length from the tip of the snout to the tip of the longer lobe of the caudal fin, usually measured with the lobes compressed along the midline. It is a straight-line measure, not measured over the curve of the body