is my fish pregnant? what is it?

[Jeff likes fish]

so i was at the petstore and noticed a fish that was separated from the rest, it was unusually fat compared to the rest of the fish. i assume it is a glow fish(modified danio) but i cannot tell. it looks like its fat enough to be loaded with eggs. help me clarify what is going on here. i feel bad for keeping it in the breeder net. but i dont want any fry/eggs to be consumed and another tank is not an option. heres a vid
YouTube - what kind of fish is this

 

[Dylan5359]

It looks like a pregnant yellow swordtail.

-Dylan

 

[Jeff likes fish]

Ohhhh that could be a possibility!

 

[EndlersEatGuppies]

It looks like a Mollie guppy cross. Don't think it is pregnant but I could be wrong.