Zoas Losing Heads

[Snowsrfr]

I woke up this morning to a colony of red p.e., I just got had two heads barely holding on. Came home tonight to find 2 had been "clipped" off about halfway between the head and base. Only thing in tank is 2 clowns, few crabs, and about 10 snails.

Any idea what could be causing this? All other zoas/palys in tank are doing just fine.

 

[A. Grandis]

Probably the crabs?
Watch them at night.
Simple.
Grandis.

 

[bigfoot610]

crabs........ always bad for zoas and check to see if you got some of those bad starfish eating them too