I have 5 mollies in my tank, cycled, 20 gallon. Two are completley yellow with red eyes, one is white and yellow with blue eyes, one is completley black (popular from what I'm told?) and then a marble mollie that is black and white spotted. Now the question, how can I determine the sex? Searches have told me to look at the dorsal fin but that doesn't really help me much... also I've read something about a modified anal fin... So, any help? I could take pictures if necessary to show so I could see if they are Male or Female. I REALLY want babies

hahaha, thanks for all your help!
Steve