Need help getting an ID on green plant thing

[Caybrook]

I just set up a new tank with 30lbs of live rock. Not sure what these things are but there are quite a few of them blowing around in the current. They are tube like organisms that are green and spiral. It is going to be a reef tank once cycled, and I am new to the salt water world.

 

[HN1]

A macro algae of some sort I would guess. I have no idea of the exact ID.

 

[NarwhalLover3]

Looks like chaetomorpha algae. Beneficial and a good nutrient exporter.