Opsariichthys evolans is a species of freshwater ray-finned fish belonging to the familyXenocyprididae, the East Asian minnows or sharpbellies. It inhabits freshwaters of southeastern China and Taiwan. It has a maximum male length of 9.0 centimetres (3.5in) and a maximum female length of 7.0 centimetres (2.8in).
12Chen, I-Shiung; Wu, Jui-Hsien; Huang, Shih-Pin (2009). "The taxonomy and phylogeny of the cyprinid genus Opsariichthys Bleeker (Teleostei: Cyprinidae) from Taiwan, with description of a new species". Environmental Biology of Fishes. 86: 165–183. doi:10.1007/s10641-009-9499-y. Also published as a chapter in the book Developments in Environmental Biology of Fishes, vol 28: Chinese Fishes.