torn ventral fins

I adopted a CT female on Saturday night that was previously owned by my boyfriends brother (who didn't really know how to properly care for bettas). She is doing great and gets along well with my peppered corys. I just noticed though that one of her ventral fins seems to be torn slightly. I'm...

Are my Betta's ventral fins (I think they're called) torn?? I've had my fish for quite a few months now, and about a month or so ago I noticed his ventral fins looking a bit torn and there are bits of white on the tips of them but cannot recall if it has always been there or not. I also have a...