Kapoho, Hawaii, 5 feet

Puako, Hawaii, 40 feet

Kure Atoll, 8 feet

He'eia, Oahu, 4 feet

Moku o Loe, Kaneohe Bay, Oahu, 3 feet

Puako, Hawaii, 40 feet

Moku o Loe, Kaneohe Bay, Oahu, 3 feet

Moku o Loe, Kaneohe Bay, Oahu, 5 feet

Haleiwa Trench, Oahu, 20 feet

Haleiwa Trench, Oahu, 20 feet

Honaunau, Hawaii, 40 feet

Kaneohe Bay, Oahu, 10 feet

Kewalo, Oahu, 60 feet

Haleiwa Trench, Oahu, 15 feet

Kailua Bay, Hawaii, 20 feet

Kailua Bay, Hawaii, 20 feet

P. duerdeni (top), P. compressa (bottom)

Abundant in protected waters.  The open water form is light gray or tan with branching finger-like projections creating extensive thickets.  The lagoon form is yellowish green with fused twisted branches creating hemispherical mounds.  Calices are shallow and the outer wall is smooth and narrow, retracted polyps and skeletal rods within the cup are flush with the surrounding area.  Knobby Finger Coral has spherical branch tips and deep calices.  Endemic to Hawaii.  Related to Porites cylindrica of the Indo-Pacific.

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