I have 3 females and 2 males. I'm feeding, among other things, a veggie pellet high in spirulina, called HBH soft spirulina. It is the staple I use for all my fish, and may contribute to the green color, but that's just speculation on my part.
I believe Matt or Felipe know the stream name, Ken Davis called them Cardozo, after a gaucho that road up on a horse looking for women, if I remember the story correctly.