OK, hopefully you are going to see the best pic I have of our new octopus. It is a lot bigger than I expected! Maybe I just don't know what a 1 1/2 inch mantle looks like!! Am really hoping it's not full grown and going to die soon, but we will see! I put it in the 50, but it looks like I may have to move it to a 125 or ??? Am really interested to see what opinions are as to identification and possible age. Diver Tom seemed pretty sure it was an O Briareus (sp).. Thanks!!