Class Anthozoa Ehrenberg, 1831
   Subclass Octocorallia Haeckel, 1866 - octocorals see Subclass Alcyonaria
     Order Pennatulacea - sea pens and sea pansies
       01 Family Anthoptilidae
       02 Family Chunellidae Kükenthal, 1902
       03 Family Echinoptilidae
       04 Family Funiculinidae
       05 Family Halipteridae
       06 Family Kophobelemnidae
       07 Family Pennatulidae
       08 Family Protoptilidae
       09 Family Renillidae
       10 Family Scleroptilidae
       11 Family Stachyptilidae
       12 Family Umbellulidae
       13 Family Veretillidae
       14 Family Virgulariidae