Hammer octopus, Octopus australis     (Family Octopodidae)    

Location: Silver Beach Baths, Kurnell, New South Wales, Australia

Depth: 2.6 m

Equipment: Nikon D7000 with Micro-Nikkor 60mm f/2.8D in Ikelite housing and 2 x Ikelite DS161

Settings: ISO200, 1/160s, f/16