is my zoo sick? Help plz!

[corallover000]

Hi! I recently found that some of my zoa (candy apple and sunny delight) looks not really happy, some part of their body rolled and cant fully expand. After two to three weeks, no any sign of recovery. And seems their mouth are digesting their tentacle, but I'm not sure. May I ask if someone else encountered this before and any treatment suggested? Thanks all!

 

[blaxsun]

Sometimes zoas will just close up for weeks on end with no explanation. You could try lightly 'dusting' it with a feeder tube (or equivalent) in the event it's got some sand or something else bothering it.