Kingdom ANIMALIA

Phylum Annelida (Segmented worms)

Class Polychaeta (bristleworms with parapodia on each segmented body part)

Class Oligochaeta (earthworms)

Phylum Arthropoda (barnacles, shrimps, crabs)

Class Insecta

Class Crustacea (lobsters, crabs, shrimp)

Phylum Bryozoa (moss animals)

Phylum Chaetognatha (arrow worms)

Phylum Chordata

Subphylum Urochordata (sea squirts)

Subphylum Vertebrata

Phylum Cnidaria (jellyfish, hydroids, anemones, corals)

Class Hydrozoa (hydroids and hydromedusae)

Class Scyphozoa (true jellyfish)

Class Anthozoa (anemones and sea pens)

Phylum Ctenophora (comb jellies)

Class Tentaculata (with tentacles)

Class Nuda (no tentacles)

Phylum Echinodermata (starfish, sea cucumbers, sand dollars, etc.)

Class Asteroidea (sea stars)

Class Ophiuroidea (brittle stars)

Class Echinoidea (sea urchins and sand dollars)

Class Holothuroidea (sea cucumbers)

Phylum Mollusca (chitons, clams, snails, squid)

Class Polyplacophora (chitons)

Class Gastropoda (snails and slugs)

Class Bivalvia (clams, oysters, etc.)

Class Cephalopoda (squid and octopus)

Phylum Nemertea (ribbon worms)

Class Anopla (unarmed proboscides)

Class Enopla (armed proboscides)

Phylum Platyhelminthes (flatworms)

Class Turbellaria (free-living flatworms)

Class Trematoda (flukes)

Class Cestoda (tapeworms)

Phylum Porifera (sponges)

Class Demospongia (encrusting sponges)