They are a tailless form thought to have been developed by goldfish breeders during the late 19th or early 20th century. The meteor goldfish lacked a tail fin, but had a well-developed anal fin in its position.
The meteor goldfish is a tailless variety believed to have originated with goldfish breeders in the late 19th or early 20th centuries. This type of goldfish has a missing dorsal fin, but possesses a prominent anal fin instead.