Porifera, Sponges, Cnidaria, Stinging cells, Platyhelminthes, Flat worms, Nematodes, Cylindrical worms with pointed ends, Annelids, Cylindrical and segmented worms, Arthorpods, Exoskeleton, Echinoderm, Water vascular System, Mollusks, Cephalopods, Gastropods and Bivalves

Invertebrate groups

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