Absolutely not. Being closely related, koi and goldfish can actively cross breed. However, the resulting progeny are usually unsightly and sterile. Butterfly koi are the result of a cross between standard fin koi and a type of long-finned Indonesian carp. Many strains of butterfly koi in the industry today were started and developed right here at Blue Ridge. You can read more about our development of butterfly koi at The Butterfly Koi Story.