Did you know there are dozens of named types of koi? Some of these koi fish varieties are unique and named, but the type you would find in a store are typically just a mixed breed of koi fish.
If you're looking for a purebred koi fish, you'll need to contact a specialty koi fish breeder. Another way to think about is this: if you walk into a koi fish store and see all the koi in a tank together like in the video below, they're probably not a purebred koi variety.