Coelenterata
The Coelenterata phylum is a phylum that encompasses two other animal phyla, the Ctenophora phylum, and the Cnidaria phylum. The Ctenophora are specifically the comb jellyfish, where the Cnidaria are the coral animals, such as sea anemones, true jellies, and sea pens. The name Coelenterata derives from the greek word "koilos", which means full bellied that refers to the hollow body that both the Cnidaria and Ctenophora are known for. The Coelenterata are made from very simple tissue, which allows them to be radially symmetrical both internally and externally.