I've heard and read such differing opinions stated as fact over Shubunkin size that I really want the scientific facts. How big do they get? Do different types grow to different sizes? I want the goods on these fish. I found a local pond fish store and the man swears that they don't get larger than 8", he said he's never seen one any bigger and that people mistake them for koi and that's why they think Shibinkins can get over a foot in length.