It's definitely not an auratus. It's either a male Johanni or maingano (this is commonly and stupidly called the electric blue johanni making more confusion) male or female. I am not schooled enough to tell the difference. I believe male Johanni start yellow like the female and turn blue black. They look the same to me but are different fish. Both used to be melanochromis but are now placed in the pseudotropheus group.