Blue tang, Paracanthurus hepatus     (Family Acanthuridae)

Location: Manta Reef, North-west Solitary Island, NSW, Australia

Depth: 4.5 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, 1/100s, f/22