Sup bro, it's been a while! Anyway yeah, I purchased some decent kohaku's that turned out to be bosai. The sizes were 11 and 12 inches at 15 months. I thought I was getting somewhat of a deal for what I paid. Thought they were left overs from the spring. I didn't know what bonsai koi was until recently, and my understanding then was growing them in a small enviorment to stunt the growth. Not thinking for the fall harvested koi there would be runts in the pack. My goal is to grow fish and see how they turn out. But I guess we'll see what happens with these? In response to your question, should the dealer notify you that they are bonsai, or could be. Yes! Dealers should be informative to a certain exstent. Especially if your in hopes of a tategoi growing out a pattern, or attaining more conformation. If I knew, I'd of asked!