Sick male marble swordtail? URGENT please.

milseain

Hi there, I just recently bought a male marble swordtail from Big Al's in Canada.
When I brought it home and put it into my tank, I noticed that their was something wrong with it's top fin. There looks to be a chunk out of it, but I'm not sure.
I called the place where I bought it, and they said that I will be able to bring it back, but since I don't have a car and it's too cold outside, I have to wait until my friends aren't busy.
Will putting this off kill all of my other fish? Does it have a disease? Will it be okay to leave it for now?

Thank you,
Milseain

http://i262.photobucket.com/albums/i...e/DSC08080.jpg
http://i262.photobucket.com/albums/i...e/DSC08085.jpg
http://i262.photobucket.com/albums/i...e/DSC08088.jpg

p.s. Sorry if the photos are blurry, and in the first photo, it is the one underneath the female guppy.

Pasfur

Looks like typical damage, but i don't think you have anything to worry about. It is possible that a bacterial infection could set into the damaged area, so you certainly don't want to keep the fish if you can return it. However, i see very little risk of infection for your other fish.