I had the pleasure of keeping two Ery. wolves. One "4 Rainbow & one "6 Orange belly- or Red-Hifin.Anyway i kept them for maybe four & half months. The red-hifin was pretty shy, it would wait until I was away from the tank before it would feed. Now the rainbow, was hell on fins. It would meet my fingers at the top of the tank, to get it's ration of chopped raw tiger shrimp.It would also attack my fish net, when I would retrieve the dead plant leaves from the tank.One day I got home from work to find the rainbow's body badly mangled at the hands' or shall I say teeth, of the red-hifin. I got discusted and traded the fish to a local fish store. But I've got to get another ery.rainbow wolf!! sorry for the long post, I'm new!!! The Ery.Rainbow wolf is a beautiful,inquisitive,and down right pugnacious little monster when it want to be!