The Ryukin Goldfish has a curved backbone, a fat belly and long feathery fins. It has a small, pointed mouth and the body is typically triangular in shape. There is a distinct hump on the back immediately behind the head. The Ryukin Goldfish comes in a variety of colors, including the Red/White, Calico, Red/Black and Red.
The Ryukin Goldfish will do well in a tank of 30 gallons of water or more with a fine gravel bottom and hardy, cold water plants, as well as backyard garden ponds of 180 gallons or more. There appears to be a definite courtship ritual when Goldfish breed. Breeding often results in up to 1,000 eggs, with fry hatching in five to six days. The fry should be fed small pieces of live or prepared foods designed for egg-laying fish.