Characters: Colonies are massive (especially in shallow water) or encrusting. The surface is even, with sinuous valleys 6-9 millimetres wide. Columellae are well developed although interlinked. Ambulacral grooves, if present, are fine. Colour: Purple-brown, grey or greenish with green or grey valley floors. Similar species: Diploria clivosa, which has a rough irregular colony surface, slightly smaller valleys and more numerous septa. Superficially resembles Platygyra daedalea of the Indo-Pacific. Habitat: Most reef environments, especially shallow slopes and lagoons. Abundance: Common