Hanauma Bay, O'ahu, 30 feet

Sharks Cove, O'ahu, 40 feet

Hanauma Bay, O'ahu, 30 feet

Kahuwai Bay, Hawai'i, 20 feet

Ahihi Bay, Maui, 4 feet

Uncommon in shallow water exposed to surge.  Forms thick knobby clumps or spreading sheets with thick margins.  Tiny calices are immersed in deep grooves separated by short irregular ridges.  White with orange-brown grooves or tan with white edges.  Study is needed to determine whether or not this is a local form of Montipora incrassata.  Endemic to Hawai'i.

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