Tunicate, Polycarpa aurata     (Family Styelidae)

Location: Fish City, Agincourt Reef, Great Barrier Reef, Australia

Depth: 10.5 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, 1/160s, f/22