Dying long tentacle plate coral?

[ejl2529]

Hello. I have a long tentacle plate coral. Recently, it has appeared to have lost some flesh and tentacles (pictures below). I was wondering if there is anything that can be done to stop/reverse this?
The parameters for the tank are good. The coral has appropriate lighting and flow.

No other corals are having any problems.

Thanks for any help.

 

[MERKEY]

What ars your parameters and have they swung at all recently?

How long have you had it?

What lights and schedule are you running?

Any shrimp or crabs that could be nipping it?