Unknown Guests on Zoa Frag

[saltmine]

What are the things all around the Zoa heads on this Frag? I dipped the coral but they opened right back up.

 

[king aiptasia]

sabellidae, good guys

 

[rkpetersen]

#reefsquad @KJ Agree that these are sabellid worms? I'm not entirely sure myself.

 

[KJ]

Agree^^^! Feather duster harmless.