This phylum's class Anthozoa is mostly sessile. Its class Cubozoa includes the deadly sea   wasp.
This phylum's class Anthozoa is mostly sessile. Its class Cubozoa includes the deadly sea   wasp. Members of this phylum have a jelly-like layer called the mesoglea. This phylum's  polyp body plan is exhibited by (*) hydras. This phylum's name is derived from the name of its  harpoon-like stinging cells. For 10 points, name this radially-symmetric invertebrate phylum that  includes corals and jellyfish.
This phylum's class Anthozoa is mostly sessile. Its class Cubozoa includes the deadly sea   wasp.
Cnidaria (accept Cnidarians; prompt on Coelenterata)