A few days ago I got a black Molly from petsmart and I put her in my tank with two other female Mollies. I am positive that she is pregnant but I'm not sure how far along. How far along does she look?
It is difficult to tell, but you can usually tell when they're within a few days as they stop eating. I think gestation is around a couple of months. But I'm not sure.
She's not been eating much and has been hanging around the heater and in the back corner behind some plants. She also has a white bump near her anal fin, you can see it pretty clearly in the picture I've attached.
I plan on getting some hornwort tomorrow so when the fry are born they have somewhere to hide
The gestation period for black molly's is about 4 weeks, but sometimes they can carry their young a bit longer.
Also, as with many/most live bearers, they often come with a 'payload' and can have multiple broods from a single fertilization.
I got her nearly two weeks ago(the second picture was the day I got her) I think she was maybe close to 2 weeks pregnant when I got her. I think her belly is started to get squared off but I'm not sure. This is the most recent picture I have of her it was taken about two days ago.