Rhodeus uyekii is a temperate freshwater fish belonging to the Acheilognathinae sub-family of the Cyprinidae family. It originates in inland rivers in South Korea. It was originally described as Pseudoperilampus uyekii by T. Mori in 1935. The fish reaches a length up to 6.0 cm (2.4 in). When spawning, the females deposit their eggs inside bivalves, where they hatch and the young remain until they can swim.