The Amur grayling (Thymallus grubii) is a species of freshwater ray-finned fish from the genus Thymallus (graylings) of the family Salmonidae, endemic to the Amur basin in Russian Far East and Northeast China and also the Onon and Kherlen basins in Mongolia.

It is sometimes difficult to differentiate the species with the Lower Amur grayling (Thymallus tugarinae).

[1] The body of Amur grayling is usually dark, with its back being slightly purple.

[3] In winter, adult Amur grayling are found in deep parts of mountain streams.

While in summer, they are usually found in clear streams flowing slowly with thick aquatic weeds.