Guess that Thing!

[Fishmonkey]

Hi Guys, I picked up some Live rock and got two hitch hikers i'm concerned about. Was hoping someone could help me out as to what they are and if they're ok to keep!

The first two are of a starfish that moves really quickly, his legs are about a 3-4 inches long! I am aware that i got a few brittle stars with the rock but one of this size???

http://img185.imageshack.us/i/img00426201005241718.jpg/
http://img227.imageshack.us/i/img00434201005241726.jpg/

And this is some sort of tube worm.. disgusting little thing to be honest, looks like an alien when it comes out. shoots out this sticky web that gets all over the place.. Not very keen on this little critter.. what can i do with him???

http://img710.imageshack.us/i/img00437201005242021.jpg/

Thanks for any advice guys!