This phylum's class Anthozoa is mostly sessile. Its class Cubozoa includes 
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)