Characters: Colonies are hemispherical or encrusting. Calices are circular in outline, with thick walls. There are usually six thick pali which are in contact, forming a crown. All septal structures are heavily granulated. Colour: Brown or green, usually with distinctively coloured oral discs and pale tips to the tentacles. Similar species: Goniopora tenuidens, which has blunt tentacles of uniform length. Habitat: Subtidal reef environments, especially lagoons. Abundance: Common