Weird tube thing on my Dendros - danger?

ultimatemj

New member
Every day this week I've woke up to find a 1/4 x 1+" tube sack thing on my dendro colony.

ImageUploadedByTapatalk1400072440.645691.jpg

It's empty like a used cocoon, but the polyp it is on doesn't want to open. I scrape it off every day and every night it comes back!

Is something trying to eat my dendros?

Only other info is I recently had some kind of bristle worm hitch hike in. Seems there is a kind that will 'lick to death' gorgonians.

Egg sack or saliva sack?
Infestation of some kind? Dip it?
Other?
 
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