Opsariichthys evolans is a species of freshwater ray-finned fish belonging to the family Xenocyprididae, the East Asian minnows or sharpbellies. It inhabits freshwaters of southeastern China and Taiwan. It has a maximum male length of and a maximum female length of .
References Also published as a chapter in the book Developments in Environmental Biology of Fishes, vol 28: Chinese Fishes.