Bristle Worm that eats zoas!

[GoFish]

So I've discovered recently that I have a bristle worm that likes munching on the stalks of zoas causing them to wither away and die. So far he's taken out a 15 head colony of Macaws, now it's starting to work on a second type. It kills about 1 head for every 2 days on average
Not sure if anyone knew they were capable of doing that. I searched and found some random threads on RC about the subject and there seems to be some peeps who just don't believe it, but trust me, it can be true.
There are many bristle worms in my display tank, but only one has developed a taste for zoas fortunately now I just have to figure out how to get rid of It. I want to keep all of the other bristle worms as they do a great job of cleaning up leftover food. So I have no plans on dipping the whole rock. I know what hole it lives in just trying to figure out a plan of action

Might first try plugging it hole with epoxy and hope that the canal doesn't have an exit.

I'll post a pic later of the culprit, just thought I'd let others know that bristle worms aren't always model cleanup citizens (which I thought they were)