Personally samphipods, copepods, snails, aiptasia and anemonia sp., , bristleworms (good), serpent stars and now some nice sponges are developing. Also serpulid worms, peanut worms , and a bivalve. And other stuff to. Alages in caulerpa, padina, coralline, green brush, purple blobby stuff, and now strange lime green 'sticks'