Sun coral, Tubastraea sp.     (Family Dendrophylliidae)

Location: Pixie's Pinnacle, Ribbon Reef #10, Great Barrier Reef, Australia

Depth: 8.1 m

Equipment: Nikon D70 with Nikkor 18-55mm f/3.5-5.6G ED II in Ikelite housing and 2 x Ikelite DS125

Settings: @ 55mm, ISO200, 1/200s, f/16