I hadn’t either. Got some fry from a lady back east last fall. Now I have a pair with fry and 7 other adults that I worry are going to run me out of the fish room. They’re as hardy as their more frequently seen cousins and more attractive in my opinion.
My female that’s guarding a brood definitely has a black mask between her eyes. Also more black markings in the unpaired fins. Males have more elongated fins but until they mature it’s tuff for me to bank on it.