Hey yall. Longtime lurker here. This is the best site ever! Anyways, I got this pus a week ago. They couldn't tell me where it was from. I'm guessing its an O defilippi. Mantle is about 1 1/4". Longest arms are about 6" and they're real long and spindley. Seems really tame; handfeeding already, sits on the glass during the day, and always comes to check me out if I'm messing around in there. So far ate a crayfish and a couple krill. He lives by himself in an 18 gallon with a skimmer. Maybe you can help me figure this guy out. How big will he get?