Let me start by saying I've been trying to read up all I can on them since I set the tank up.I have a newer tank, tank is a few years old but I just got it back from my mom (she somehow managed to kill all her fish after she gave her BF the boot.) I set it up and got a few fish to cycle it, too many fish, I now know. I have a few mollies and some guppies. Had only a couple male guppies at first but added some females in. I also have a really pregnant molly and a molly male and another female that doesn't look pregnant. (so 3 very small mollies and maybe 7 or 8 guppies in a 30 gallon tank). Miss Molly looks like she's about to POP but the male guppies will not leave her alone. She's been hanging out in the darker corner of the tank(seems almost in a trance) and the guppies are fighting eachother and mating with her. I was gonna leave her in to have the babies because the tank isn't even cycled and I'm not ready for babies yet. I dont have another tank for the molly or the boys but if they keep it up I'm going to go feed them to the ducks.. So can the guppies even fertilize the molly? Is she giving off some sort of scent that is attracting them? No other option then to take her out though huh? but I dont have another tank or another heater..