I made an impulse buy on divers den and just acclimated him today. No idea what he is but he's pretty cool. Already seen some neat camo tricks. For now all I've got is the liveaquaria photo. He also seems to have little horn looking things over his eyes. I really want to know if he is nocturnal. So far both octos I've had have been. Not fun to only watch them under a red light.