Tube Worms?

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I have a few colonies of these tube work like creatures. they each only have two flagella like tentacles (about the thickness of a human hair) coming out of their tubes. Are these indeed a tube worm? Their tube is about 1/2" long and tentacle is 1" long.

 

[steve-s]

Harmless filter feeder.
http://reefkeeping.com/issues/2003-05/rs/index.htm
(near the bottom of the page)

Cheers
Steve

 

[got bait?]

chaetopterids is it. Thanks Again. Nice thread too.