Class Anthozoa Ehrenberg, 1831
   Subclass Octocorallia Haeckel, 1866 - octocorals see Subclass Alcyonaria
     Order Pennatulacea - sea pens and sea pansies
       Family Pennatulidae
         1 Genus Crassophyllum Tixier-Durivault, 1961
         2 Genus Gyrophyllum Studer, 1891
         3 Genus Pennatula Linnaeus, 1758
         4 Genus Pteroeides Herklots, 1858
         5 Genus Ptilosarcus Verrill, 1866
         6 Genus Sarcoptilus Gray, 1848