Well gorgs(non photosynthetic that is), tunicates, shrimps, suncorals, but they re HARD to keep, sponges, and to expand on what ms. tizz said, look into christmas tree worms, and coco worms. (their is an article that is linked in the archives, by probably the smartest person on earth {LOL}that has some nice feather duster coco worm and christmas tree worm info) hmmm...let me think on it, and I will come back to you.