Kingdom Animalia Linnaeus, 1758 - animals Phylum Cnidaria Hatschek, 1888 - cnidarians Class Anthozoa Ehrenberg, 1831 1 Subclass Octocorallia Haeckel, 1866 - octocorals see Subclass Alcyonaria 2 Subclass Hexacorallia Haeckel, 1866 - sea anemones and true corals see Subclass Zoantharia de Blainville, 1830 3 Subclass Ceriantipatharia see Subclass Zoantharia de Blainville, 1830