my male kills just about everything you put in the tank. I started with 6 small Angels and over two months time he had bully the others to the point of death. He was getting so big i couldn't buy smalls any more. So i bought one med. to test how he would react? to this day he has never once picked on that fish. Must have got lucky when picking it cause now i have a pair. I know Angel are suppose to be in groups of 4 or more but in scared he will kill them and there not cheep.