Possible ID and new photo

[::pete::]

Can someone ID these. They are worm looking appear to be attached to the rock, expand and contract and are fuzzy? They seem to be more active at night.

[::pete::]

Added a daytime photo.

[SuperXdude]

bristle worm? although I have only seen reddish color ones.

[::pete::]

After viewing them more which is hard because when the light comes they retract. Anyways, here is a pic of what they are and look like at night extended.

digitate hydroids