Porifera (sponges)
Placozoa (Trichoplax)
Ctenophora (comb jellies)
Cnidaria (jellyfishes, box jellies, sea anemones, corals, sea pens etc.)
Myxozoa
Acoelomorpha
Orthonecta（Rhopalura etc.)
Rhombozoa (Dicyemida)
Platyhelminthes (flatworms) (planaria, tapeworms, blood-flukes etc.)
Entoprocta (goblet worms, kamptozoans)
Micrognathozoa (Limnognathia maerski)
Cycliophora (Symbion pandora)
Rotifera (rotifers) (incl. Acanthocephala)
Gnathostomulida（Gnathostoma etc.)
Gastrotricha
Mollusca (chitons, limpets, conch, sea hares, snails, tusk shells, clams, squid, nautilus etc.)
Annelida (incl. Sipuncula, Echiura, Siboglinidae) (earthworms, leeches etc.)
Ectoprocta (moss animals)
Nemertea (ribbon worms)
Brachiozoa (incl. Phoronida) (lamp shells, horseshoe worms)
Chaetognatha (arrow worms)
Priapulida（Priapulus etc.)
Loricifera（Pliciloricus etc.)
Kinorhyncha（Antygomonas etc.)
Nematoda (nematodes)（Caenorhabditis elegans, ascarids, hookworms etc.)
Nematomorpha (horsehair worms)
Tardigrada (water bears)
Onychophora (velvet worms)
Arthropoda (lobsters, crabs, "Drosophila",. silkworm, spiders, scorpions, centipedes etc.)
Xenoturbellida（Xenoturbella）
Hemichordata (acorn worms)
Echinodermata (crinoids, starfish, sea urchins, sand dollars, sea cucumbers etc.)
Chordata (lancelets, tunicates, zebrafish, Xenopus, mouse, monkey etc.)