Marine life profile
Giant cuttlefish
Recorded at 8 dive sitesWhere 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.
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
Sightings map
Giant cuttlefish locations
Plan a dive
Dive sites with reported encounters
Sutherland Point
Australia
Sutherland Point is a perfect destination to find the highly interesting Weedy Sea Dragon, as well as a unique attraction in the form of a small cave which is home to the family of blind sharks. The site has numerous swim-throughs and a small sponge garden and commonly a large variety of schooled fish such as Yellowtail, Giant Cuttlefish, Wobbegongs and Blue Groper may be seen. The site is shielded from southernly swell and can be dived when it's too rough for the other sites in the area. Because of its proximity to the shore of the bay, its visibility is usually not as good. For the best visibility, it’s always best to dive this site on an incoming tide.
Gordon's Bay
Australia
Gordon's Bay is renowned for its accessibility and year-round appeal for divers and snorkelers. The calm conditions and a maximum depth of 14 meters make it a popular spot for all levels of divers. Gordon's Bay is famous for the underwater nature trail, a 600-meter path marked by a chain that guides you through the site. The trail leads to "The Wall," which is home to many Port Jackson sharks and Wobbegong sharks. Along the nature trail, divers also commonly encounter the famous Blue Groper, a local legend and a favorite among divers. Photos by Aquatic Imaging Australia.
Osborn Shoals
Australia
The top of the reef is covered in kelp as you drop over the wall to the 24m mark you will see a variety of soft sponges. The site is easy to navigate as you just keep the reef on one side on the way out and the other side on the way back. A great array of macro underwater creatures and the usual cool Sydney marine life can be observed at this site. Here you will see a variety of Sydney's native marine life, including blue groper, red morwong, cuttlefish, mado, striped wrasse, silver sweep, sergeant baker, old wife, striped sea pike, white ear, black reef leatherjacket, yellow-striped leatherjacket, Port Jackson shark and many more.
Stonehenge
Thailand
Stonehenge is a superlative dive site and must be considered one of the top scuba spots in Thailand. Stonehenge is located only 5-10 minutes from Koh Lipe by boat and is full of Soft Leafy Coral making it a beautiful and vibrant reef. Generally you will see schools of Barracudas, Trevally & Yellow Snappers. Smaller creatures include Seahorses, Shrimps, Crabs, Nudibranchs, Seamoths, Stonefish & Frogfish. As this site is very exposed, strong currents can be expected, meaning diving here around Full or Black moon is not usually possible.
The Steps
Australia
The Steps is a great dive site, especially when you want to see weedy seadragons. The site is a favourite location for many divers because of its beautiful sponge gardens. You are likely to find Weedy sea dragons masquerading as Kelp, along with Bream, Old wives, Luderick, Blue gropers, Giant cuttlefish. We recommend diving this site on slack or incoming tide. Once in the water, descend and head North to the sandy line at which point turn east (heading out of the bay). Check the kelp for sea dragons after 40 m. The kelp opens into many rocks covered in sponges with a range of fish life. When you reach your turnaround pressure, head back into towards the shore where you encounter a wall of large boulders which are the home form many cuttlefish. Follow the wall back to your exit/entry point. If you have never observed seadragons then this is the site for you, but we do recommend a guide for the first dive as the guide can show you how to spot the weedy seadragon.
Vera-K
Cyprus
The Vera-K is a Lebanese freighter that ran aground in 1972 and was later used for target practice. As a result of this it was blown up due to being a hazard to passing vessels in 1974. It is still in four main sections and the bridge is fairly intact. It lies completely submerged in a crater at 11m. The top of the crater which surrounds this wreck is only around 5-7m deep which makes it great for snorkelers and new divers. Drop into the crater by the bridge and take a look inside! Due to the explosion and length of time the wreck has been underwater we no longer swim through the bridge. From the rear of the bridge you can see all of the inside which is beginning to slowly crumble. The side sections of this wreck offer the perfect home to resident marine life, including octopus and cuttlefish. Towards the back of the crater there is a large archway with multiple entrances as well as a series of swim throughs. Maximum depth on this dive site is 12m as you exit the archway.
Cape Maeda (Blue Cave)
Japan
Tourist attraction for the walking trails and Blue Cave. Heavily advertised for the Blue Cave. You can enter it on the surface or under water. To enter the dive site from shore you will need to walk down 90+ stairs. Great spot for beginners, however pay attention to your depth. The visibility can be 100' on any day. Due to the amount of fish at this site it can be like diving in an aquarium. Facilities: Restroom on site during (Seasonal hours) Pay Parking (Yen only - Cash) Shower rooms (Yen only - Cash)
Ella's Garden
Malaysia
Begin the dive in a sand channel where we often see big barracudas schooling or trevally hunting. Swim out to the big boulder rocks where giant cuttlefish, octopus and bigfin reef squid make home. Drift over huge flat table corals and round barrel sponges and perhaps encounter an eagle ray gliding by. As you reach the shallow rocky area you will encounter an explosion of life, as shimmering schools of fish gather to feed in the current.