[1] Thymallus yaluensis is a small fish, with a maximum recorded length of 20 cm (7.9 in).

[1] It is renowned in Korea for having "the most beautiful form and fins of a freshwater fish".

[1] Some confusion exists regarding the identity of T. yaluensis, as it closely resembles the Arctic grayling (Thymallus arcticus) in form and has often been treated as a subspecies (T. a.

[1] According to mitochondrial DNA, T. yaluensis is, however, inseparable from the Amur grayling (Thymallus grubii), and was suggested to be a junior synonym of that.

[3] Confusingly, it has also been reported from widely separate regions including Siberia, the Alps in Europe, and the northern Mississippi River drainage in North America.