The ryukin is a hardy and attractive variety of goldfish with a pointed head and has a pronounced hump on the back behind the head of an adult. It may be long-finned or short-finned with either a triple or quadruple tail. The dorsal fin is high while the caudal fin is often twice as long as the body.
A distinguishing feature common to both the Ryukin Goldfish and the Fantail Goldfish is the split or double caudal (tail) fin. A long-tailed version of the Ryukin is called the Fringe-tail or Ribbon-tail Ryukin. The Ryukin Goldfish are available in red, red and white, tri-color, calico, white, and base colour with hightlights.