Cnidarians are members of what phylum?

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Explanation:

Cnidarian, also called coelenterate, any member of the phylum Cnidaria (Coelenterata), a group made up of more than 9,000 living species. Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans.

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If you get a map and put the countries a states all together it forms all one piece you can also tell because of the earth quakes