Orange molly has a bump and possible parasite?

[ColdWafflez]

Hi, I am new to the fishkeeping hobby and had some help from a friend on setting up my tank. Unfortunately this orange molly that I got from petsmart looks to have a problem. Seems as if theree a bump on its stomach with something hanging out of it. I think it might be a parasite. I would greatly appreciate any help. Thank you!

 

[Colin_T]

take it back and swap it for another one.

 

[CaptainBarnicles]

Stuff like this annoys me... I mean, the shop assistant can clearly see there's an issue but they'll quite happily sell it on regardless ?