The beautiful Ryukin Goldfish are a Japanese version of the fantail goldfish. They were developed from the common Fantail Goldfish. Like their Fantail counterpart, they are one of the more rounded or egg-shaped fancy goldfish.
The Ryukin Goldfish are easily differentiated from the Fantail by their extremely high back, which is often described as a dorsal hump. The hump starts in the neck region and gives a more pointed appearance to the Ryukin’s head, They also have a wider caudal fin than the Fantail. A distinguishing feature common to both the Fantail and the Ryukin Goldfish is their split or double caudal (tail) fin.
A long-tailed version of this fish is called the Fringe-tail or Ribbon-tail Ryukin. This fish comes in a variety of colors: red, red and white, tri-color, calico, white, and chocolate.