Any thoughts what this might be ?

[CHI-Mark]

All

I noticed an unusual round spot on a piece of my coral. I attached 2 pictures so everyone can see what I'm talking about. I thought it was just a imperfection in the coral but after staring at it for awhile it does move and cast a web similar to a vermited snail.

Any ideas ?

 

[ahiggins]

Ive seen people ask about these before. I believe youre on the right track with vermitid. Its some sort of burrowing worm that sends tentacles out to feed. I wouldnt want it there but Im not sure of a good corrective action.
Im sure others will chime in.