Class Anthozoa - cnidarians with only a polyp phase (no medusa); consists of soft & hard corals, sea fans, sea anemones & allies. Both colonial and solitary, often building great reefs in tropical and deep-sea waters.

​

Subclass Hexacorallia - Stony corals, black corals, sea anemonies in broad sense, & tube anemones. Often colonial & reef forming corals with six or fewer axes in symmetry body-part structures.

​

Order Scleractinia - stony/hard corals

​

Families

Acroporidae

Agariciidae

Astrocoeniidae

Caryophylliidae

Deltocyathidae

Dendrophylliidae

Euphylliidae

Faviidae

Flabellidae

Fungiidae

Lobophylliidae

Meandrinidae

Merulinidae

Montastraeidae

Mussidae

Oculinidae

Pocilloporidae

Poritidae

Psammocoridae

Rhizangiidae

Scleractinia incertae sedis

Siderastreidae

Stenocyathidae

Trochosmiliidae

​