Bristle worm eats soft corals

[Ace Park]

I have hard time on keeping soft corals especially pipe organs. Once they're adopted, open their polyps pretty well and seem good but times goes by the polyps are getting disappeared and finally it became as an empty skull. I had not realized the reason why but now I am sure that the culprit is small bristle worm. They're devouring the corals because I have found out that they're wriggling in between coral's structure at night.

They've been found out not only on Pipe oragn's skull but also star polyp and even bottom of the leather corals. The worms what are shown on my tank look like just less than 1/2 inch, 1mm thick, kind of small one.

I'd like to eliminate them by adopting wrasse. According to my experience, six line wrasse obviously doesn't care of the worm at all.
What kind of natural predator would you like to recommend?

 

[rssjsb]

Pipe organs can be finicky and often do not take kindly to being moved.

Can you post a picture of the worm? The vast majority of worms that turn up in the hobby are harmless detrivores, even those that people label fireworms. In fact, I would be willing to bet that either (1) your coral was on the way out for other reasons or other pests or (2) what you've got is not an ordinary bristle worm but a eunicid or other predatory critter.

In order to recommend a fish, I would need to know more about your set up. How big is your tank, what corals and other fish are in it, how long has it been set up, etc. You get the idea.