Is my hydnopora being eaten?

[ArticI]

Hello, 2 am days ago I noticed that my hydnoporas polyps weren't extended. I took a closer look and noticed that there seemed to be some spots at the base without any flesh on them. I have some sexy shrimp and was wondering if they were eating it or if this is something else. Sorry for the less than quality pic but it's the best I could get

 

[tripdad]

Need a better pic to help.

 

[Piper27]

Normally hydnophoras eat everything else I don't think it would get eaten. Hard to see the picture. It's an LPS coral from my understanding as well.