Id's On Hitchhickers?

[bg7003]

I just got some live rock for my tank. I'm new to this whole saltwater tank thing. When i was looking at the rock i just got in my aquarium, i noticed that there are atleast two feather dusters growing on it. Really small though. Then weh i looked closer, there were these tiny tube things swaying back and forth. Any idea what they are? I'll try to get some pics but there so small.

 

[SkiFletch]

There are all kinds of FD's, and they're pretty much all good. So take a deep breath and relax