Found on my Zoa

[Manny'sReef]

This was on one of my zoas I brought from a LFS. It has little antennae on the top right zoa.

Any ideas?

 

[sbash]

Probably a zoa eating nudibranch. Remove it ASAP and dip all your zoas if you can. Watch for new ones as well (i.e. eggs could hatch); especially if your zoas don't open when they normally would...

 

[ZachR32]

Seconded on nudi. Remove asap. They can be a pain to get rid of once they start laying eggs

 

[KJ]

Zoa eating nudibranch remove them.