Here is one of my males.I have had him around a year and he just started growing a head about 1 month ago.He has been alone and with other males divided but it was when I put him next to a very aggressive female that it started growing.
He is around 9" and not sure what I will try to breed him with maybe nothing since he is easily the meanest damn fish I have ever owned.I mean just mean to me and to all fish bigger,smaller ,male or female