The beautiful Ryukin Goldfish, Fancy Goldfish are a Japanese version of the Fantail Goldfish. The Ryukin Goldfish are easily differentiated from the Fantail by their extremely high back, which is often described as a dorsal hump.
History and Origin of Ryukin Goldfish
Very popular in both the US and Japan, the Ryukin is a Japanese breed which appears very similar to a Fantail except for it's massive dorsal hump. In recent years breeders have tried to enhance this hump, making some Ryukins outrageously tall.
It is named after a string of Islands between Japan and Taiwan. It was bred in Japan from Fantail stock starting in the late 1700s.
Ryukins can be found with Fringetail, Butterfly Tail and Ribbontail finnage, in addition to the standard Fantail fin types. But common fantail finnage is the norm.