Blue sea star, Linckia laevigata     (Family Ophidiasteridae)

Location: Lighthouse Bommie, Ribbon Reef #10, Great Barrier Reef, Australia

Depth: 17.6 m

Equipment: Nikon D70 with Nikkor ED 18-70mm f/3.5-4.5G IF in Ikelite housing and 2 x Ikelite DS125

Settings: @ 18mm, ISO200, 1/80s, f/16