Eric Walker added Turritopsis to Oceaniidae, and added Oceaniidae to Anthoathecata

Eric Walker added Hydra (genus) to Hydridae, and added Hydridae to Anthoathecata

Eric Walker added Hydridae and Oceaniidae to Anthoathecata, and added Anthoathecata to Hydrozoa

Eric Walker added Anthoathecata to Hydrozoa, and added Hydrozoa to Cnidaria