Sorry but maybe I should say this again. I am breeding koi in four large ponds and have checked this subject out for some time now.
KOI DO NOT BREED TRUE even with pure bloodlines. Any two koi of the same type will give you a different variety of koi. The only type of koi that come even close to breeding true is Kohaku, and still then you will have a mix.
Maybe I can find some good info on breeding koi types and post for you. I spawned a pair of momotaro kohaku this past spring and got all types. The pair is pictured on my icon. These two koi are pure japaness bloodlines.
