[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlentera
       Phylum Nematophora Huxley, 1850
         Class Anthozoa Ehrenberg, 1831
           Order Hexactiniæ
             1 Genus Actinia Linnaeus, 1767 - sea anemone
             2 Genus Oculina Lamarck, 1816
             3 Genus Antipathes Pallas, 1766