tube like creature

nipit8

Reefing newb
i have a couple of small tubelike creatures affixed to my LR(less than 5 mm)--when feeding my tank they emit a long clear hairlike thread that seems to "catch" tiny bits of food--any idea what they are??--will try to take pics and post
 
I would also say vermetid snails. they are harmless except when the thread covers corals then it can suffocate them.. peppermint shrimp are known to help control them if they get bad on you..
 
thanks guys and gals--they are vermatid snails.....i googled it and the pic is exactly what i have!! much appreciated
 
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