I saw some mollies and they looked fat. Which type of mollie is this?

<_< we dont know unless we have a picture. the usual ones are black and white. this is the dalmation mollie. there are balloon mollies too though i havent seen any.

They were probably balloon mollies. They look VERY fat. I have one of them (I had two, but one recently passed away).

Do baloon mollies come in silver?

Yes. Mine is a whitish silver color. Very pretty.

theres always the possiblity that there going to have fry aswell?