coelenterate

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coelenterate An invertebrate animal with a radially symmetrical body, a body wall consisting of two cell layers, and a body cavity (gastrovascular cavity) that communicates with the outside via a single opening, the mouth. Coelenterates include hydras, jellyfish, sea anemones, and corals (see Cnidaria) and also the comb jellies (see Ctenophora).

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