I have this Cichlid which is the most aggresive fish i have ever had. it has to be kept on its own because it will just badger/wrestle/nip any fish to the death. I have uploaded the little vid of it. hope it works
I pretty certain its some sort of American Cichlid of which I wouldn`t have a clue. Sorry you might have more luck in the South American/New World Section.
That's one angry fish. If I was you I would get a muzzle and chock-chain to keep that fella under control. Will it attack your hand it you put it in the tank to carry out maintenance?