Characters: Colonies are massive, hemispherical or irregular. Corallites are rounded with thick walls and have six prominent paliform lobes. Polyps are elongate. Colour: Uniform grey with blue mouths (which may photograph pink). Similar species: Goniopora tenuidens, which has closely packed uniform polyps and corallites with thin walls. See also G. djiboutiensis, which has larger polyps. Habitat: Shallow reef environments. Abundance: Common.