Characters: Colonies form flat unifacial explanate plates with corallites in long, roughly concentric valleys. Valleys are closely (2-4 mm) spaced. Corallites are small, close together (5-8 per cm) and face upwards. Columellae are weakly developed. Colour: Grey, grey-brown or green. Similar species: Agaricia undata. See also A. grahamae, which has larger valleys, and A. agaricites. Habitat: Sheltered reef environments. Abundance: Generally uncommon.