It's not a kk and the kok on this fish will never get massive.
Whether its a kk or not that's what he bought him as so thats what its called it doesn't matter what it is. How would you be the one two judge for kok size? I would say from pics of juveniles with a similar shape to his that I've seen really pop with age, a couple years that little kok will just get bigger and bigger. It isn't always the ones with prematurely overly developed koks that get the biggest.
