Characters: Colonies are composed of irregular, usually flattened branches with or without encrusting bases. Monticules are usually fused into ridges down branch sides. Main branches are 7-12 millimetres thick. Colour: Cream or green. Similar species: Hydnophora grandis, especially where colonies are exposed to wave action. Habitat: Shallow reef environments, especially lagoons and protected reef slopes. Abundance: Sometimes common and may form extensive single species stands