Coral boring worms?

[425nm]

Does anyone know of any species of worms that bore into Euphylia or other corals?
I was fragging some coral the other day. Cut through a branch with the ringsaw, put the frag into some seawater and out pops this:



Here's a link to a short video of it flailing around the tupperware container.
http://s22.photobucket.com/user/Amemaru/media/VID_20140102_121929_zpscda8e421.mp4.html


Pretty sure it came out of here (it was rather unexpected and I'm not sure if I trust what I think I saw):


My distrust of my memory aside I did notice little holes in the skeleton.


I dipped the frags after but did not find anymore worms.

[duncangweller]

I had a similar worm in an encrusting monti

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