Taxonomy Tournament: Cnidarians
Polypodiozoa. This class contains only one species, P. hydriforme, which is one of the few animal parasites that lives inside the cells of other animals (fish)
Octocorallia. This class is made up of aquatic colonial animals with 8-fold symmetry. It includes soft corals and sea pens.
Which clade of animals is better?
Polypodiozoa
Octocorallia
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