Gouramiguy17

I have 1 black molly in with my livebearers and she just attacks this one blue platy whenever She gets the chance. I am starting to feel bad for the blue platy. She is constantly bullied. What is causing this? She isn't aggressive to any other fish.

JoeSmo

Mabye your black mollie is a male and the platy is a female? More information would be nice, but you might not have a good male to female ratio. 1 male to every 3 females is what I (and a lot of other people) recomend.

Gouramiguy17

No they are both females, the molly dropped like a year ago but my male died when she dropped and none if the fry survived(stupid nitrates). The female platy is a female because my male platys go after her and they don't have gonopoduims either

Fish_Face

I have a female molly, and she chases my hatchetfish around a lot, too. She doesn't bother the other fish, though... I wish I could give you an explanation, but I'm going through the same thing! I hope things are cleared up with your fish, soon!