does anybody know what fish are not dead ends?

the haplochromis is not.
the B. splendins is not
the the yellow platy is a good avenue
the pseudochromis i think must be a dead end

(sorry I may have spelled some of those wrong. i don't feel like pulling out the latin dictionary. I breed fish for a living and love this game. I wish the hybrids were more realistic though. but, it is the easiest breeding tank I own.)