Class Anthozoa
Subclass Octocorallia (or Alcyonaria)
- Order Stolonifera (organ-pipe coral and tree fern coral)
- Order Telestacea (Telesto)
- Order Alcyonacea (soft corals such as leather corals and tree corals)
- Order Coenothecalia (Indo-Pacific blue coral)
- Order Gorgonacea (gorgonian corals including sea fans, red coral, sea whips, and sea feathers)
- Order Pennatulacea (sea pens and sea pansies)
Subclass Zoantharia
- Order Zoanthidea (anemonelike anthozoans)
- Order Actiniaria (sea anemones)
- Order Scleractinia or Madreporaria (reef-building corals such as star corals, brain corals, staghorn corals, mushroom corals, and bubble corals)
- Order Rugosa or Tetracoralla (extinct solitary corals)
- Order Corallimorpharia (resemble true corals but lack skeletons)
- Order Ceriantharia (anemonelike anthozoans)
- Order Antipatharia (black corals)
Subclass Tabulata (extinct colonial anthozoans)
