Just wanted to update this. March 1 my clown will turn 23.
He has grown a bit, closer to 8.5. I just found some pics from 2010 and I could see the difference clearly.Definitely still growing but at a very slow rate.Wow! has he gotten any bigger than 7"
Thats pretty incredible. Didn't know anything but tortoises made it that far.The longest-lived, with documentation, is Grandad. The Shedd Aquarium's AUL. He's eighty but, considered to be in his hundreds. He arrived at Shedd in 1933 FULLY GROWN.
A few koi in Japan's Royal Gardens are thought to be at the 150 years range. While no formal documentation exists, it was recognized from artist paintings and drawings that a few identical koi patterns have been rendered by different artists for a century and a half.