i have bristle worms with an orange front body around the head for the first 1/3 of the worm. Then the rest of the body is brown. They have been eating my Zoos and taking the food right out of their mouth and upsetting. So i took a 6 piece of pvc tubing, capped it, drilled small whole. Then put a piece of krill in there and fishing line to lift up the trap each day. I've been catching six worms a day or better. My zoos are out agian and all coral is doing better. The bristle worms where so many they were running out of food and disturbing my corals