Characters: Colonies are composed of irregularly encrusting bases with short branches of irregularly fused corallites. Corallites are 4-7 millimetres diameter and are thick walled forming an interlocking clump. Septa are in three cycles, the first being exsert with prominent elaborated spines. Costae are irregularly contorted, also with elaborated spines which extend across the coenosteum. Colour: Cream. Similar species: Echinopora hirsutissima, which has much less irregular corallites. Habitat: Shallow partly protected reef environments. Abundance: Rare.