So I recently got bitten by the Betta bug again, after having my last Betta several years ago. I'm posting here because the female (Sally) that I have is unlike any betta I have ever seen, as she seems to have a lyre tail. I know the picture is very unclear, I'm still getting used to shooting fish in water, and I've only just gotten her. If anyone has any shooting tips, that would be greatly appreciated too! The inside edges of the tail fin(s?) are both completely straight, not a single jagged edge, similar to what i see on my CT. Both sides are identical, and the middle is also smooth. Can anyone give me some insight?
I don't know if its finrot (why only the center? Wouldn't that effect the whole fin, or at least some on the other fins?) but I would definitely say that looks more like an injury of some kind, and you should probably keep her water really clean and use some anti-biotics.
 I also see what looks to be a healed lesion on her side, so yeah, I would talk to OFL and see what she thinks you should do.
Thanks for the help. :) I don't think that it's fin rot, she looks perfectly healthy and active, and she doesn't have any stress lines or anything. I have put some BettaFix in her water, as with the water of the two males, as Chester actually DOES have fin rot. The only thing I'm wondering about is that the "fins" on either side are EXACTLY the same, identical in every way, down to the number of spines. The people at the store were told by the breeder that it was some kind of spike tail? But they called it lyre tail, which is a more familiar term for me. I was just wondering if anyone had encountered something similar?