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Giant cuttlefish

Marine life profile

Giant cuttlefish

Recorded at 8 dive sites

Where divers encounter it

Explore Giant cuttlefish around the world

The giant cuttlefish, also known as the Australian giant cuttlefish, is the world's largest cuttlefish species, growing to 50 cm (20 in) in mantle length and up to 100 cm (39 in) in total length. It hunts with patient precision and uses complex color displays during Australia's spectacular breeding gatherings.

Dive sites8
Countries5
Animal groupCephalopods
Safety profileGenerally Harmless

Meet the species

What to look for

How to Recognize It

A large cuttlefish with W-shaped pupils, broad arms and a skirt-like fin rippling around the body.

How It Behaves

It hunts with patient precision and uses complex color displays during Australia's spectacular breeding gatherings.

Special Ability

Color, contrast and skin texture can change across the body in a fraction of a second.

Dive responsibly

Share the water well

How to Approach

Move slowly, stay low and let curiosity bring it closer. Avoid bright lights, sudden movements and reaching into its shelter.

Safety

Observe without touching. Some species can bite or carry potent venom, and every individual needs an unobstructed escape route.

Worth knowing

The detail you remember

Interesting Facts

Smaller males may mimic female coloration to slip past larger rivals and reach a mate.

Where to Find

Check rocky crevices, rubble, reef ledges, seagrass and sandy bottoms, especially near dawn, dusk or during night dives.

Known countries

AustraliaThailandCyprusJapanMalaysia