Missing Fin

[edkohl]

I dont know if this is an emergency in the fish world but If Iwas missing an arm I would thinkn so. I just bought some rose-line barbs. Then I woke up in the morning and noticed that one of them was missing a fin on their right side. There is just a little nubbin' there that he uses as a fin when he wants to swim. He doesnt seen to have any problems getting around.
I dont know if I bought him that way or if an other fish bit it off.
In any case does it ever grow back?! Please help poor Dean, the fish.

 

[millym]

hi
if you can give us some more info about your tank ie: size, how long its been going, what other fish are in it what are your water tests ( ammonia,nitrite,nitrate etc) it will help us help dean.
it could have been bitten off but depends on tankmates. if it has been bitten off keeping your water pristine clean & maybe adding a mild antispetic type stuff like melafix will help soothe & healing with the 'stump'. melafix is ok to put in your whole tank (unless you have a betta in there they need a milder variety of the stuff)
does the edges of the fin have a whitish border?? if so it could be finrot if it looks a bit sort of raggedy & whitish on the edges you can buy a med from your lfs to help treat this & make sure it doesnt get worse.
ideally you should isolate this fish so you dont treat the whole tank with finrot & fungus med.
let us know so we can help you out properly.
even better would be if you can post a picture of the affected fish.