Kailua Bay, Hawai'i, 15 feet

Hanauma Bay, O'ahu, 20 feet

Waimanalo, O'ahu, 20 feet

Hale'iwa Trench, O'ahu, 30 feet

Sharks Cove, O'ahu, 20 feet

Sharks Cove, O'ahu, 20 feet

cropped

Portlock, O'ahu, 20 feet

Driftwood, Hawai'i, 40 feet

Hale'iwa Trench, O'ahu, 15 feet

Makapu'u, O'ahu, 20 feet

Makapu'u, O'ahu, 20 feet

Taema Bank, Tutuila, American Samoa, 75 feet

Hale'iwa Trench, O'ahu, 20 feet

Moku Manu Pinnacle, Oahu, 100 feet

Blowhole, Oahu, 30 feet

Massive colonies with thick angular plates are common  in shallow water exposed to surge, while deepwater forms exposed to current tend to be small encrustations.  Pit-like calices have stout star-like ribs that are shared, pale tan in shallow water, darker with yellow or green in deep water.  Hawai'i, the Indo-Pacific, and Tropical Eastern Pacific.

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