Characters: Polyps are circular, up to 300 millimetres diameter, thick and flat or strongly arched. Septa are almost equal at the polyp perimeter. Septal teeth are fine but clearly visible. There are no tentacular lobes. The undersurface has pits between the costae. Costal spines are granular. Tentacles are usually slightly extended during the day giving the polyp a speckled appearance.
Colour: Usually brown with pale tentacles.
Habitat: Reef slopes and lagoons.
Taxonomic Note: A species complex. Called Lithophyllon repanda by Gittenberger, Reijnen and Hoeksema (2011) from molecular data. However, Lithophyllon is colonial with distinctive generic-level characters.