Sun coral, Unknown species     (Family Dendrophylliidae)

Comment: Probably Tubastraea

Location: Steve's Bommie, Ribbon Reef #3, Great Barrier Reef, Australia

Depth: 14 m

Equipment: Nikon D300 with Micro-Nikkor 60mm f/2.8D in Ikelite housing and 2 x Ikelite DS125

Settings: ISO200, 1/200s, f/16