These animals belong to three different groups:
1. Medusaes belong to the phylum Cnidarians, which includes jellyfishes, sea anemones and corals. Unique to and characteristic of all cnidarians are the stinging cells used for capturing prey.
2. Ctenophora constitute a small phylum that are commonly known as comb jellies. They are so delicate that they are difficult to collect with plankton nets, and the group is still poorly known.
3. Apendicularians, or larvaceans, have a nerve cord, and thus belong to the same phylum as us: "Chordata". Apendicularians are pelagic tunicates and looks like tadpole larvae.