hi there,
yes she is pregnant not very far as already said, i think she is a sword tail though as i have one the same colour ,sword tails are very like the platy in shape,very pretty fish you have .
Yeah, I'd say she's a Swordie too. Her body looks too elongated to be a Platy. Maybe a Variatus/Maculatus cross though...but I'd say Swordie. That's a typical Swordtail color.
I also echo the pregnant, but not too far along statement.
mine must really like being pregnant mine get super fat and have 30-50 at a time i usually save like 25 of them and the rest well if they can survive in the big tank ill keep them and the 25 in the other tank go to the lfs