Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Cnidaria Hatschek, 1888 - cnidarians
     Class Anthozoa Ehrenberg, 1831
       Subclass Hexacorallia Haeckel, 1866 - sea anemones and true corals see Subclass Zoantharia de Blainville, 1830
         Order Actiniaria - sea anemones
           Genus Actinia Linnaeus, 1767 - sea anemone
           Genus Actinostola Verrill, 1883
           Genus Adamsia E. Forbes, 1840
           Genus Aiptasia Gosse, 1858
           Genus Alicia Johnson, 1861
           Genus Anthopleura Duchassaing & Michelotti, 1860
           Genus Anthothoe Carlgren, 1938
           Genus Bartholomea Duchassaing & Michelotti, 1864
           Genus Bunodactis Verrill, 1899
           Genus Calliactis Verrill, 1869
           Genus Condylanthus Carlgren, 1898
           Genus Diadumene Stephenson, 1920
           Genus Edwardsia Quatrefages, 1841
           Genus Epiactis Verrill, 1869
           Genus Halicampa see Genus Halcampa Gosse, 1858
           Genus Haliplanella Hand, 1955
           Genus Heteractis Milne-Edwards & Haime, 1851
           Genus Lebrunia Duchassaing & Michelotti, 1860
           Genus Liponema Hertwig, 1888
           Genus Metridium Blainville, 1824
           Genus Minyas Cuvier, 1817
           Genus Peachia Gosse, 1855
           Genus Phyllodiscus Kwietniewski, 1897
           Genus Sagartiomorphe
           Genus Stomphia Gosse, 1859
           Genus Tealia Gosse, 1858
           Genus Triactis Klunzinger, 1877
           Genus Zaolutus Hand, 1955