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Alveolates
Dinoflagellates; ciliates, including tintinnids
Choaaflagellates
Choanoflagellates, Monosiga
Foraminiferans
For as, Globigerina
actinopods
Radiolarias, acantharians, heliozoans
Chlorophyta
Green algae: sea lettuce
Rhodophyta
Red algae: laver, Dulce, coralines, Irish moss
Phaeophyta
Brown algae: rock weed, knotted wrack, kelp, sargassum weed
Anthophyta
Flowering plants: sea grasses, cordgrass, mangroves
Porifera
Sponges
Cnidaria
Hydrozoans, jellyfish, corals, sea anemones, gorgonians
Ctenophora
Comb jellies
Platyhelminthes
Turbellarians, flukes, tapeworms
Nemertea
Ribbon worms
Phoronida
Phoronids
Bryozoa
Bryozoans (moss animals)
Brachiopoda
Lamp shells
Mollusca
Chitons, snails, nudibranch, bivalves, tusk shells, nautilus, octopus, squid, cuttlefish
Annelida
Polychaetes, spoon-worms, beardworms
Nematoda
Nematodes
Arthropoda
Hors
Chaetognatha
Arrowworm
Echinodermata
Sea stars, brittle stars, basket stars, sea urchins, sand dollars, sea cucumbers, and crinoids
Hermichordata
Acorn worms
Urochordata
Tunicates, sea squirts, salps, and larvaceans
Cephalochordata
Lancelets
Myxini
Hagfish
Petromyzontida
Lampreys
Chondrichthyes
Sharks, rays, skates
Holocephali
Chimaeras, ratfishes
Actinistia
Coelacanths
Chonodrostei
Sturgeons
Neopterygii
Modern ray-finned fishes
Crocodilian
Saltwater crocodile
Testudines
Sea turtles
Samurai
Marine iguana
Serpentes
Sea snakes
Ciconiiformes
Herons
Charadriiformes
Oystercatchers, plovers, turnstones, sandpipers, curlews, avocets, stilts, gulls, terns, skuas, jaeger birds, skimmers, alcids
Pelecaniformes
Pelicans, boobies, cormorants, frigatebirds
Procellariiformes
Albatrosses, petrels, shearwaters
Sphenisciformes
Penguins
Mustelidae
Sea otter
Ursidae
Polar bear
Otarridae
Eared seals, sea lions, fur seals
Phocidae
True seals
Obodenidae
Walrus
Sirenia
Dugongs and manatees