Octopus tetricus
56cm
0-60m
1 sites
Octopodidae
Prepare to be amazed! The Common Sydney Octopus (Octopus tetricus) is a master of disguise and a fascinating sight for any diver or snorkeller exploring the reefs of Southern Australia and the South Pacific. Typically around 56cm but reaching up to 80cm, these intelligent cephalopods are benthic dwellers, meaning they prefer to hang out on the seafloor. You're most likely to spot them in shallow, neritic zones, down to a depth of 60 meters. Keep an eye out for their dens – often a small crevice or discarded shell – as they are ambush predators, patiently waiting for a tasty crab or shrimp to wander by. The real thrill comes from observing their incredible camouflage abilities and complex problem-solving skills. They are truly a highlight of any dive!
The Common Sydney Octopus can be tricky to spot, thanks to its incredible camouflage! Look for a medium-sized octopus with a generally mottled brown or grey appearance, though this can change dramatically depending on its surroundings. Its skin texture is often bumpy or warty. They have eight arms covered in suckers, and a bulbous mantle (body). Their eyes are relatively large and expressive, often giving away their location. Keep an eye out for their characteristic 'slinging' behaviour, where they use two arms to propel themselves across the seafloor.
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