CNIDARIANS

"Cnidarians, which are sometimes called "coelenterates", include corals, anemones and jellyfish. All of these creatures have stinging cells in their tentacles, which they use for defense, and for the capture of prey. Coral reefs, which are restricted pretty much to the tropical areas of the world's oceans, are havens of biodiversity, and for that reason are sometimes called the "rain forests" of the sea."