This is a photo of a group of jellyfish that I saw at the aquarium. These jellyfish are moon jellyfish and they belong the phylum Cnidaria. The subphylum they belong to is Scyphozoa. All members of the class Scyphozoa have a medusa that is large and long-lived. This organism is in the medusa shape which is similar to lots of other jellyfish in its phylum.
What other traits allow classification of jellyfish into phyla Cnidaria?
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