Convex reef crab, Carpilius convexus     (Family Carpiliidae)

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

Depth: 5.5 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