Id on random sweepers

[Anubisxii]

So I have these random sweepers coming from my rock work.

I thought they were digitate hydroids but they have a smooth tentacle with a small dot on the end. It's not furry like the pictures of digitate hydroids I've seen. Any 2 cents?

 

[MERKEY]

I would guess spaghetti worms...

 

[king aiptasia]

is there only a couple tentacles? they may be of a brittle star or a feeding tentacle of a polychaete, either way it is harmless