I currently have a 3 gallon mantis tank (N. wennerae), it's been a great little tank, but I'm trying to get down to two tanks. I have a 50 gallon tank with a diadema dottyback and a damsel. I want to move the mantis into that tank, but that is one mean dottyback. He snacks on peppermint shrimp and is making life miserable for the damsel. So my question is this - who will win, the dottyback or the mantis?? I could care less if the mantis enjoys a dottyback dinner, but would be very very sad if it were the other way around. Opinions???