six line wrasse if they are not too big. when i tore down my last reef we found a 14" fire worm in the DSB. just thought i would throw it in as part of the big fish story but true. six line wrasse is neat fish and will help keep your bristle worm population down if worms are small. they also will help control preditory snails (small) from your clams. good luck, and dont let those worms get big or you will have a problem getting them out.