Worm?

Nate0712

Reefing newb
I noticed this spiral worm looking thing on my live rock. When I try to touch it, it sucks up into a clear tube looking thing. It also produces a string looking thing. What is this??
 
Vermetid snail? I dont know what else, I still put my bet on feather duster, I cant think what else has a clear tube, vermetids dont have clear tubes so I dunno. :?
 
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