Melanochromis auratus.

How big does he get or is it a female???

Males usually get to be about 6 inches, females about 5. They both look similar in color initially and then males turn a bluish hue and females stay this color. Just so you know they are known to be very agressive, even against bigger fish. I have a male and he is about 3 inches now. He displays all the time to bigger fish, but so far no actual agression.

dangerous cichlid. i had one that killed a majority of my first set of cichlids when i started. even cichlid double his own size. i would suggest to keep him solitary. but if you want other cichlids. make sure there much bigger and aggressive species. such as chipokaes, kenyi's, red zebra's.

I have him with other cichlids he gets hes but kicked from my three inch texas