Common goldfish
(重定向自Wakin)
The common goldfish, also known as feeder fish, is a type of goldfish with no other differences from their ancestors other than their color. Goldfish are a form of domesticated wild carp and are a close relative of koi. Most varieties of fancy goldfish were derived from this simple breed. Common goldfish come in a variety of colors including red, orange, yellow,white, black, and calico goldfish.