Phylum: Porifera

Class: Calcarea

Phylum: Porifera

Class: Demospongiae

Phylum: Porifera

Class: Hexactinellida

Phylum: Cnidaria

Class: Anthizoa

Subclass: Octocorallia

Order: Gorgonacea

ex: Sea Whips & Sea Fans

Phylum: Cnidaria

Class: Anthizoa

Subclass: Octocorallia

Order: Pennatulacea

ex: Sea Pens

Phylum: Cnidaria

Class: Anthizoa

Subclass: Octocorallia

Order: Alcyonacea

ex: Soft Corals

Phylum: Cnidaria

Class: Anthizoa

Subclass: Hexacorallia

Order: Actiniaria

ex: Sea Anemones

Phylum: Cnidaria

Class: Anthizoa

Subclass: Hexacorallia

Order: Scleractinia

ex: Stony Corals

Phylum: Cnidaria

Class: Scyphozoa

Order: Semaeostomae

ex: Jellyfish

Phylum: Cnidaria

Class: Scyphozoa

Order: Stauromedusae

Phylum: Cnidaria

Class: Hydrozoa

Order: Hydroida

ex: Hydroids & Fire Corals

Phylum: Cnidaria

Class: Hydrozoa

Order: Siphonophora

ex: Man-of-War

Phylum: Cnidaria

Class: Hydrozoa

Order: Chondrophora

ex: By-the-Wind-Sailor

Phylum: Cnidaria

Class: Cubozoa

ex: Sea Wasps, Box Jellies

Phylum: Ctenophora

Order: Cydippida

Phylum: Ctenophora

Order: Beroida

Phylum: Ctenophora

Order: Lobata

Phylum: Platyhelminthes

Class: Terbellaria

Order: Acoela

Phylum: Platyhelminthes

Class: Terbellaria

Order: Tricladida

Phylum: Platyhelminthes

Class: Terbellaria

Order: Polycladida

Phylum: Platyhelminthes

Class: Monogenea

Phylum: Platyhelminthes

Class: Trematoda

Phylum: Platyhelminthes

Class: Cestoda

Phylum: Nemertea

Class:

Anopla - Proboscis not armed with stylets, mouth seperate from proboscis opening

Enopla - proboscis armed with stylets, mouth and proboscis share opening

Phylum: Rotifera

Phylum: Nemata

Phylum: Annelida

Class: Polycheata

Order: Phyllodocida

Ex: Sand Worms, Scale Worms

Phylum: Annelida

Class: Polycheata

Order: Terebellida

Ex: Spagetti Worms

Phylum: Annelida

Class: Polycheata

Order: Sabillida

Ex: Feather Duster Worms

Phylum: Annelida

Class: Clitellata

Sub-Class: Oligochaeta

Ex: Earth Worms

Phylum: Annelida

Class: Clitellata

Sub-Class: Hirudinoidea

Ex: Leaches

Phylum: Arthropoda

Sub-Phylum: Trilobitomorpha

Phylum: Arthropoda

Sub-Phylum: Cheliceriformes

Class: Chelicerata

Sub-Class: Merostomata

Ex: Horseshoe Crab

Phylum: Arthropoda

Sub-Phylum: Cheliceriformes

Class: Chelicerata

Sub-Class: Arachnida

Ex: Spiders, Scorpions, Mites, Ticks

Phylum: Arthropoda

Sub-Phylum: Cheliceriformes

Class: Pycnogonida

Ex: Sea Spiders

Phylum: Arthropoda

Sub-Phylum: Myriapoda

Class: Chilapoda

Ex: Centipedes

Phylum: Arthropoda

Sub-Phylum: Myriapoda

Class: Diplopoda

Ex: Milipedes

Phylum: Arthropoda

Sub-Phylum: Hexapoda

Class: Insecta

Phylum: Arthropoda

Sub-Phylum: Crustacea

Class: Branchipoda

Phylum: Arthropoda

Sub-Phylum: Crustacea

Class: Maxillopoda

Sub-Class: Copepoda

Phylum: Arthropoda

Sub-Phylum: Crustacea

Class: Maxillopoda

Sub-Class: Thecostraca

Ex: Barnacles

Phylum: Arthropoda

Sub-Phylum: Crustacea

Class: Malacostraca

Order: Decapoda

Ex: Crabs, Lobsters, Shrimp

Phylum: Arthropoda

Sub-Phylum: Crustacea

Class: Malacostraca

Order: Isopoda

Ex: Isopods

Phylum: Arthropoda

Sub-Phylum: Crustacea

Class: Malacostraca

Order: Amphipoda

Ex: Amphipods

Phylum: Mollusca

Class: Polyplacophora

Ex: Chitons

Phylum: Mollusca

Class: Gastropoda

Sub-Class: Prosobranchia

Ex: limpets, littorines, whelks, cone shells

Phylum: Mollusca

Class: Gastropoda

Sub-Class: Opisthobranchia

Ex: Sea Slugs, Sea Hares

Phylum: Mollusca

Class: Gastropoda

Sub-Class: Pulmonata

Ex: Slugs & Snails

Phylum: Mollusca

Class: Bivalvia

Sub-Class: Lamellibranchia

Ex: Clams, Cockels, Mussels, Oysters, Scallops

Phylum: Mollusca

Class: Scaphapoda

Ex: Tusk Shells

Phylum: Mollusca

Class: Cephalopoda

Sub-Class: Nautiloidea

Ex: Nautilus

Phylum: Mollusca

Class: Cephalopoda

Sub-Class: Coleoidea

Ex: Cuttlefish, Squid, Octopus

Phylum: Ectopracta (Bryozoa)

Phylum: Brachiopoda

Phylum: Phoronidea

Phylum: Echinodermata

Class: Crinoidea

Ex: Sea Lilies

Phylum: Echinodermata

Class: Asteroidea

Ex: Sea Stars

Phylum: Echinodermata

Class: Ophiuroidea

Ex: Brittle Start & Basket Stars

Phylum: Echinodermata

Class: Echinoidea

Ex: Sea Urchins & Sand Dollars

Phylum: Echinodermata

Class: Echinoidea

Ex: Sea Urchins & Sand Dollars

Phylum: Echinodermata

Class: Holothuroidea

Ex: Sea Cucumbers

Phylum: Chordata

Sub Phylum: Urochordata

Class: Ascidacea

Ex: Sea Squirts

Phylum: Chordata

Sub Phylum: Urochordata

Class: Thaliacea

Ex: Salps

Phylum: Chordata

Sub Phylum: Urochordata

Class: Appendicularia

Ex: Lavaceans