I have/had some nice new orange and green Zoas with about 12 heads purchased on Saturday. I am now down to about 6 heads.

Possible suspects: coral banded shrimp, emerald crab, various hermit crabs..
The CBS was hanging around that area, but never saw him take a swipe at it.
Anyone have any negative experiences with these inverts and zoas?
I have heard of CBS as suspects, but never any proof..