hey afro i am like you as well on the hybrid issue but if you do have a few extra mutts i could take some off your hands and no i will not let them into circulation just a thought, mine are still way to young but i have the golds and blacks together in my 120gal and i have extra tanks for slow growing fry, yeah i thought you knew that calvus were shell breeders aye pretty cool and yes the male if he is able to poke his head in the shell he will grab a few eggs or fry if given the chance but usually the female acts as a wedge so he can not get to them, man thats awesome i cant wait til my calvus spawn, good job buddy..