I have a Melanochromis auratus that is obviously male.(became dark in color after maturing from juvenile) He has been chasing around my Melanochromis johannii for weeks, as if he wanted it dead. Now all of a sudden, he keeps the johannii in his "home," and will not let it leave. He just goes back and forth from this home, to patrolling just outside of his home, as if to keep the other fish away. I believe he must be trying to breed with what seems to be a her. Does this seem like the case? and please, for those of you tempted to scold me about interspecies breeding, or tank stock, kindly keep it to yourself, because i don't care.