So I'm pretty sure my female molly is pregnant. She has the white spot on her anal vent and it protrudes quite a bit. My male molly just started chasing her and kind of nipping at her butt. Why is he doing that?
The male fish doesn know or understand that the female is alredy pregnant, his brain just says "sex sex sex sex! " in the wild its how the species stays alive, in the tank, you need to keep more females then males.