Cnidarians

• Cnidarians feed using tentacles that are embedded with stinging nematocysts
• Unlike more advanced animal phyla, cnidarians lack a central nervous system. Instead, their nerves are organized in nerve nets that cover the entire body. Impulses spread slowly out from the point of stimulation along the nerve net
• Cnidarians are divided into three major classes. These are the Hydrozoa (hydras and other colony-forming species), the Scyphozoa (jellyfish), and the Anthozoa (sea anemones and corals)

"Cnidaria." Animal Sciences. Encyclopedia.com, n.d. Web. 18 June 2017.