I'll leave it to the scientist to figure out. But getting back to the fish. Males tend to have a blue sheen throughout it's body whereas females tend to remain tan with black markings. This is a very easy fish to breed and is certainly worth keeping. Pairs can be bred in forty gallon tanks, but be careful because they are aggressive toward each other.
Males are extremely colorful.
I eventually lost the female due to aggression. I believe with most Parachromis when you remove their eggs from the tank you are jeopardizing your female. With my experience males tend to kill off females as though he is blaming her for the egg lost. Chances are that your female will be floating in the morning. All rights reserved Special rights for exclusive electronic distribution are given to Juan Miguel Artigas Azas, in The Cichlid Room Companion .