Sharkfin, Lana'i, 80 feet

Pearl & Hermes Reef, NWHI, 35 feet

Sharkfin, Lana'i, 80 feet

Kewalo Pipe, Oahu, 55 feet

Makua, Oahu, 25 feet

Beachworn specimens

Uncommon on sand or rubble in deeper water.  Circular & dome-like with six prominent ribs, bottom slightly convex at the center.  Often has bright orange or green fluorescent color.  Juveniles are hexagonal.  Attains 1.5 inches.  Easily confused with the larger Fungia granulosa.  Hawaii & the Indo-Pacific.  Juveniles were known as Cycloseris hexagonalis.

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