I just purchased 2 female Lyretail Dalmation Molly today and added them to my 20 gallon. As soon as I released them into the tank, my white male Balloon Bellied Molly started breeding with both of my new Molly! I was surprised because I had forgot that they could mate! I'm pretty sure that there mating, because the male constantly follows the females and rubs his stomach on the females stomachs, and constantly looks like hes chasing and "sniffing" her abdomem. I'm pretty sure its mating behavior. If it is, that means I'm gonna have two pregnant fish. Amazing ! LOL. I'm gonna video tape the behavior and post it on the video section soon!