Colonies are massive, rounded or flat. Corallites are conical. Septa are slightly irregular and widely spaced. Paliform lobes are poorly developed.
Colour: A wide variety, often mottled, with pale calices.
Habitat: May be a dominant species on reef back margins.
Taxonomic note: Source reference: Veron (2000). Taxonomic references: Scheer and Pillai (1974), Veron, Pichon and Wijsman-Best (1977). Additional identification guides: Veron (1986), Sheppard and Sheppard (1991), Nishihira and Veron (1995).