Should I try to get rid of it, or leave it. I know for a while people thought that the bristle worms were bad, and destroyed fish, coral, and inverts...but as I read up on them it seems as though they are more understood now as part of your clean up crew. This little guy I have is probably 2 inches and hitchhiked on some liverock. Question is...do I get rid of him or do I leave him be?