Masochist Fish!

I think my Coral Beauty is a masochist lol. I always see it trying to provoke my purple lobster hanging around its cave or messin with my coral banded. I don't ever really see it fighting with any fish but yet ever since I have had it it always looks beat up. The fins on each side are half of what they should be. Pieces of the tail fin are missing and theres are marks on the side of its body but hes still happy and I guess healthy swimming all over and eating really well, jus not as pretty as when I first go him.

 

If it's getting worse it sounds like it's having an issue with another fish/invert in your tank, what other fish do you have in there? Just because you don't see it happening doesn't mean that there isn't some aggression/bullying/nipping going on between fish, unless you're actually able to watch the tank from dawn till dusk.
Coral banded shrimp have been known to take swipes at fish, how big is it compared to the Coral Beauty?