I had a pair of orange skunks in the 90's that were so aggressive in a 120 that they would beat the crap out of ANY fish I introduced into the tank. If the fish was small, they would grab it and stuff it into their anemone - game over. Eventually gave them away to a professional breeder friend of mine, who in turn passed them on to another breeder. They are still alive - breeding like clockwork - but all owners said the same thing "boy are those fish MEAN!"