Hey Terry, I have had this tang for several months now, it is about 3" from nose to tail. It seems to change from dark grey to almost black at a whim. It can do it in a matter of seconds also. Some people thought it may be A. Bahanius, but I am not too sure and have no idea if it is going to change much as it matures. Here is my old thread with another pic or 2 from when I first got it. http://www.reeffrontiers.com/forums/showthread.php?t=3050