Goldfish
The goldfish ("Carassius auratus") is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is one of the most commonly kept aquarium fish.
Goldfish
Like their wild ancestors, common and comet goldfish as well as Shubunkin can survive, and even thrive, in any climate that can support a pond, whereas fancy goldfish are unlikely to survive in the wild as their bright colours and long fins make them easy prey. Goldfish can hybridise with certain other species of carp as well as "C. a. gibelio". Within three breeding generations, the vast majority of the hybrid spawn revert to the wild type colour. Koi may also interbreed with the goldfish to produce sterile hybrids.