So I have a cichlid tank that is also home to a one inch green spotted puffer. I figured (for now at least) that all was well because all of the fish are about the same size. So I get really sick (stomach sick, it was gross) so I stayed at my parents house for a day and a half. I come back to find the puffer abnormally plump, well after a quick head count I realize that my gorgeous pseudo demasoni was gone. And not that I don't love my fish indiscriminately, but he ate the really pretty one not the muted colored one. Grrrrrr. I leave them alone for less than two days, and they go and eat each other.