Characters: Colonies are flat, encrusting and commonly over one metre across. They are irregularly shaped, sometimes forming short columns and tubes. The coenosteum is coarse.
Colour: Dark green, brown or grey.
Similar Species: Astreopora moretonensis, which has a similar growth-form but is distinguished by its smooth coenosteum and the presence of rootlets.
Habitat: Rocky foreshores, in shallow water.
Abundance: Rare in the tropics but sometimes common in subtropical Japan.