Pls help!!!

[Ricsy]

I just notice this big white spot on my clownfish fin I have 2 clown but the other one doesn't have it!!
Can u pls help me identify what it is?!
And I know is not ich cause it's ***** bigger than ich!!

Sorry not the best pic!

 

[Tori]

Bite mark or scratch maybe? Kind of hard to see.

 

[Ricsy]

Bite mark or scratch maybe? Kind of hard to see.

It's not a bike mark and its not a scratch cause it's on his white part of his fin!