Characters: Colonies are massive or flat and usually fully meandroid, with thin walls. Septa are thin and slightly exsert. Columellae are weakly developed and there are no columella centres. Colour: Variable dull or bright colours. Similar species: Platygyra ryukyuensis. Resembles Goniastrea favulus underwater. Habitat: Most reef environments, especially back reef margins. Abundance: Usually uncommon.