Metazoa (Metazoans) 80

Eumetazoa

Bilateria

Acoelomata

Platyhelminthes (Flatworms)

Cestoda (Tapeworms)

Monogenea (Parasitic flatworms)

Trematoda (Flukes)

Turbellaria (Free-living flatworms)

Coelomata

Deuterostomia

Chaetognatha (Arrow worms)

Chordata (Chordates: animals having a notochord, vertebrates)

Echinodermata (Echinoderms: starfish, sea urchins, sea cucumbers)

Hemichordata (Hemichordates: sawblades and acorn worms)

Xenoturbellida (Delicate, ciliated marine worms that feed on molluscs)

Protostomia

Annelida/Echiura/Pogonophora group (Segmented worms, marine worms)

Brachiopoda (Lamp shells: shelled sedentary marine animals)

Bryozoa (Bryozoans: lace corals, colonial marine 'moss animals')

Entoprocta (Entoprocts, goblet worms)

Mollusca (Mollusks: shellfish, squid, octopus, snails)

Myzostomida (Small parasitic worms of echinoderms)

Nemertea (Ribbon worms)

Panarthropoda (Arthropods: insects, spider, lobster, crabs)

Priapulida (Predatory marine mud worms)

Sipuncula (Sipunculids: peanut worms)

Pseudocoelomata

Acanthocephala (Thorny-headed worms)

Archiacanthocephala (Spiny-headed endoparasitic worms)

Eoacanthocephala (Parasitic worms of fish and turtles)

Palaeacanthocephala (Intestinal parasitic worms)

Polyacanthocephala (Endoparasitic worms)

Cycliophora (New phylum discovered in 1995)

Symbion (Live on mouthparts of lobster)

Gastrotricha (Gastrotrichs)

Chaetonotida (Small aquatic worms)

Macrodasyida (Microscopic aquatic worms)

Kinorhyncha

Homalorhagida (Kinorhynchs, free-living marine animals 1 mm or smaller)

Micrognathozoa

Limnognathia (Microscopic invertebrate with 32 moving jaw parts)

Nematoda (Roundworms, nematodes)

Chromadorea (Ssecernentea)

Enoplea (Adenophorea)

Nematomorpha (Horsehair worms)

Gordioida (Gordian worms)

Nectonematoida (Horsehair worms)

Rotifera (Rotifers)

Bdelloidea (Moss rotifers, haven't reproduced sexually in 40 million years)

Monogononta (Sexually reproducing, make up 90% of the rotifers)

Seisonidea (Marine bisexual rotifers that live on crustaceans)

Bilateria incertae sedis

Gnathostomulida (Jaw worms)

Cnidaria (Cnidarians)

Anthozoa (Anthozoans)

Alcyonaria

Alcyonacea (Soft corals)

Funiculinidae (Deep water sea pens)

Gorgonacea (Sea fans, sea whips, gorgonians)

Helioporacea (Blue corals)

Pennatulacea (Sea pens, sea feathers, sea pansies)

Telestacea (Branched pipe corals)

Ceriantipatharia

Antipatharia (Black corals)

Ceriantharia (Tube-dwelling anemones)

Dendrobrachiidae (Black coral)

Zoantharia

Actiniaria (Sea anemones)

Corallimorpharia (Coral-like anemones)

Ptychodactiaria (Cold water anemones)

Scleractinia (Stony corals)

Zoanthidea (Colonial anemones)

Cubozoa (Jellyfish)

Cubomedusae

Carybdeidae (Box jellyfish)

Chirodropidae (Sea wasps)

Hydrozoa (Hydrozoans)

Hydroida

Anthomedusae (Flower medusa)

Leptomedusae (Thecate hydroids)

Limnomedusae (Freshwater jellyfish)

Milleporina (Fire corals)

Siphonophora (Siphonophores)

Calycophorae (Calycophores: numerous, preditory, lack pneumatophore)

Cystonectae (Portuguese Man-O-War)

Physonectae (Deep-water siphonophora)

Stylasterina (Hydrocorals)

Trachylina (Trachyline medusae)

Scyphozoa (Jellyfishes)

Coronatae (Crown jellyfishes)

Rhizostomeae

Cassiopeidae (Upsidedown jellyfishes)

Catostylidae (Blue jellyfishes)

Rhizostomatidae (Rhizostomid medusse)

Semaeostomeae

Cyaneidae (Sea-mane jellyfish)

Pelagiidae (Sea nettle)

Ulmaridae (Moon jellyfish)

Stauromedusae (Stalked jellyfishes)

Ctenophora (Ctenophores: comb jellies, sea gooseberries)

Cyclocoela (Comb jellies)

Beroida (Comb jelly that lack tentacles)

Cestida (Venus's girdle, ctenophore having short tentacles)

Lobata (Lobed comb jelly)

Typhlocoela

Cydippida (Jelly hydromedusa)

Platyctenida (Deep-sea slugs)

Mesozoa (Small internal parasites of marine invertebrates)

Orthonectida (Wormlike parasites)

Rhombozoa (Rhombozoans)

Myxozoa (Phyla of ciliated parasitic protozoans)

Myxosporea (Fish parasites)

Placozoa (Simple balloon-like marine animal; phyla has only one species)

Porifera (Sponges)

Calcarea (Ccalcareous sponges)

Hexactinellida (Glass sponges: deep-sea sponges with spicules made of silica)