Characters: Colonies are hemispherical to encrusting. Calices have small columellae and long, regular, steeply plunging septa. Paliform lobes are absent. Columellae are small or absent. Colour: Usually greenish brown with distinctively coloured oral discs and pale tips to the tentacles. Similar species: Goniopora pendulus, which has larger polyps and dissimilar skeletal characters. See also G. tenuidens and G. minor, which are both distinguished by the presence of paliform lobes and/or broad columellae. Habitat: Shallow reef environments. Abundance: Uncommon except at Norfolk Island, western Pacific.