Help me I D please

[rynosaurus]

I know the picture isn’t the best but I have know idea what these are. To the right side of the clam. I’ve just now noticed them but tank has been up for over a year. They look like feather dusters but the tubes are soft unlike a feather duster.
Thanks in advance!

 

[Lovemyreef2015]

Different types of feather dusters will have soft tubes.

 

[BestMomEver]

They look kinda like some type of paly but I can’t tell. Someone will come along!