Nudibranch, Pteraeolidia ianthina     (Family Glaucidae)

Location: Bare Island, La Perouse, NSW, Australia

Depth: 10.7 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, 100s, f/16