Cnidarians come from the Kingdom Animalia.
Examples of the Phylum Cnidaria:
(Class-Scyphozoa)
          (Order-Stauromedusae)
                    (Famliy-Eleutherocarpidae)
                             (Genus-Haliclystus)
                                       (Species-Halicystus auricular)

(Class-Anthozoa)

           (Order- Alcyonacea)

                     (Family- Cornulariidae)

                               (Genus- Sarcodictyon)

                                          (Species- Sarcodictyon Catenata)