I discovered I've got bristleworms. They are fairly long (3"+), brownish-grey. Saw 4 of them coming out of my rockwork last night after the lights went out. My tank is newly set up (2 weeks old), no livestock in it yet. I've been researching bristleworms and am getting conflicting info. On the internet, I find articles which say they are predatory, will eat corals, and should be removed. In Shimek's "Marine Invertebrates", it says they are beneficial detrivores and good to have? I'd like to know what you all think! Thanks!