correct me if I am wrong but I think this fish called kawarimono. I bought it on July 2006 from local dealer. it was 6 inches then. it's now 15 inches. my kids and wife wanted some sparkling in the pond so I got this gin grin. to my untrained eyes, I thought I bought a gin grin chagoi then but it's not the case. I didn't even notice the fins were small then until now. it's a good learning lesson.
the upside is that this fish can put on some length in such of short time. I hope it continue to grow at this growth rate. I like its look too.
I plan to keep this fish so don't hold back on your opinions. let me know what you think.
Steve