Leather coral problem or fish problem?

[6stokes]

Do you think I have a fish that is nibbling on this leather? I know it's not the clowns, as they've used this coral as a host for about eight years. I did add a couple new fish recently, but can't seem to catch anyone in the act.

 

[nycbob]

what fish hv u added recently? it does look like something took chucks out of it.

 

[6stokes]

I added a javanese damsel and a sailfin tang. I think it may be the damsel, as he is for sure doing a lot of sand rearrangement. I'm pretty sure he uses his mouth to blow the sand causing crazy sand storms. If you think it's him, I'll solve two problems in one post...

 

[ajroc31]

Don't panic just yet, it might be setting itself up for reproduction.