Gamma rays and my betta

[HestonFan23]

I noticed the other day that my betta had a big hole in his tail. I am talking about the very back tail of a betta. Steve is a normal veiltail betta. He lived at wal-mart before i bought him. His tail went from having a small hole to splitting into two separate but smaller tails.

Is this normal for bettas as they get older? I do not see anything that looks unnatural about this split. Steve is also very healthy and happier since I took the ghost shrimp out of his tank.

[masshiimarro]

mmm a picture would help..
but from your description, thats not supposed to happen DX and it sounds like it could be finrot..

[masshiimarro]

or actually it could be that he tried flaring, and split his tail on accident due to the hole that was already there. what worries me is the original hole..