is my fish pregnant

I recently donated all of the juvenile mollies in my tank to the LFS I work at, and now that there’s more room in the tank my mollies have been “doing it” nonstop. Yesterday I noticed that my black molly’s belly was a bit bigger and more squared off, but now I’m concerned. She’s removing herself...

I was looking at my fish today and felt like it’s stomach looks like it’s big and need to know if I’m going to need to watch out for babies so I can separate them when they’re born so they don’t get eaten. I’m wondering if anyone is able to tell! Thank you for your help!