Coreoleuciscus splendidus, also known as the swiri or Korean splendid dace, is a species of fish from the cyprinid family endemic to rivers of the Korean peninsula. It was first scientifically described by Tamezo Mori in 1935, who noted in 1936 that it could be found spawning in Gyeongsangbuk-do's Uljin County; a 1939 study also found it in the Geum and Seomjin rivers. A South Korean survey conducted between April 1966 and November 1989 of 4909 sites south of the Korean Demilitarized Zone found it in 659 sites; it was not seen to appear in the Yeongsan, Sapgyo, or Anseong rivers. It typically spawns between the beginning of May and the middle of June.