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Invertebrates are found in every Environment, Echinoderms e.g. Starfish, Invertebrates do not have Backbone, Cnidaria e.g. Corals, Cnidaria e.g. Jellyfish, Mollusks e.g. Squid, Annelids e.g. Earthworms, Invertebrates can be Sponges, Invertebrates can be Crustaceans, Invertebrates can be Cnidaria, Invertebrates can be Nematodes, Invertebrates can be Flat Worms, Invertebrates can be Arthropods, Invertebrates can be Mollusks, Invertebrates can be Echinoderms, Invertebrates can be Annelids, Invertebrates can be Rotifers, Invertebrates have a Ventral nervous system