George Patterson wrote:

Don Geddis wrote:

To turn the question around, why do you want to get rid of them?

Too many of them. I was thinking about getting a hawkfish, until I found that
they eat things like the cleaner shrimp that I also would like to have. The
various answers so far to my question (especially the Geek's links) have
convinced me to keep them.

If you're seeing a lot of bristleworms while your lights are on it
could be a sign that you're overfeeding or, possibly, might not have
enough water flow. With inadequate water flow the food will settle
quickly on your live rock and substrate where the worms (and other
various creatures that make up the "live" part of your live rock) will
grab it.