Alofau, Tutuila, American Samoa, 20 feet

Locally common on shallow reefs exposed to wave action.  Thick, mostly vertical ridges, columns, or fingers, radial corallites exsert with thick collars, light brown.  Isopora cuneata is structurally identical but grows horizontally.  Formerly known as Acropora palifera.  Indo-Pacific excluding Hawaii.

All coral skeletons illustrated are from scientific collections taken prior to 1998.