How collenterates and phelykel minthes differs from each other
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Medusa is a mobile life cycle stage of the Cnidaria phylum, contracting with it muscular bell. Polyp have a tubular shape and are fixed at their base, with the mouth present at the other end of the tube facing the water. Medusa have a bell shape, with tentacles hanging down. Polyp do not have a manubrium
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