Help! What is on my frag???

[Amandakayphoto]

Hello all! Hoping you can help ID what is on my frag... obviously woried about the dreaded aptasia, but this looks a bit different... feathery almost. Thoughts???

There are numerous of them around the frag.

 

[DinoMagnet]

Looks like a feather duster

 

[Amandakayphoto]

Looks like a feather duster

That is what I was hoping, but didn't want to overlook anything more sinister... thank you!!!