Porifera (sponges)
Placozoa (Trichoplax)
Ctenophora (comb jellies)
Cnidaria (jellyfishes, box jellies, sea anemones, corals, sea pens, myxozoans etc.)
Orthonecta（Rhopalura etc.)
Rhombozoa (Dicyemida)
Platyhelminthes (flatworms) (planaria, tapeworms, blood-flukes etc.)
Gnathostomulida（Gnathostoma etc.)
Gastrotricha
Micrognathozoa (Limnognathia maerski)
Rotifera (rotifers) (incl. Acanthocephala)
Ectoprocta (moss animals)
Entoprocta (goblet worms, kamptozoans)
Cycliophora (Symbion pandora)
Nemertea (ribbon worms)
Brachiozoa (lamp shells)
Phoronida (horseshoe worms)
Mollusca (chitons, limpets, conch, sea hares, snails, tusk shells, clams, squid, nautilus etc.)
Annelida (incl. Sipuncula, Echiura, Siboglinidae) (earthworms, leeches etc.)
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 (Convoluta, Xenoturbella etc.)
Hemichordata (acorn worms)
Echinodermata (crinoids, starfish, sea urchins, sand dollars, sea cucumbers etc.)
Chordata (lancelets, tunicates, zebrafish, Xenopus, mouse, monkey etc.)