PETER SCOONES / Broadclub cuttlefish male display {Sepia latimanus} Indonesia

Fred Olivier / Common reef octopus (Octopus cyanea) hunting, with Coral trout (Plectropomus) following to pick up scraps, Uepi Island, Solomon Islands.

Fred Olivier / Tracking shot of a Common reef octopus (Octopus cyanea) hunting, changing colour for camouflage, and wrapping coral heads to capture prey, Uepi Island, Solomon Islands.

Alex Mustard / Shoal of three Bigfin reef squid (Sepioteuthis lessoniana) in open water at night. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Free swimming mimic octopus (Thaumoctopus mimicus). Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Free swimming mimic octopus (Thaumoctopus mimicus). Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Veined octopus (Amphioctopus marginatus) shelters inside an old clam shell, with silver-sides in the water above. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Alex Mustard / Veined octopus (Amphioctopus marginatus) emerging from its home in an old clam shell. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Shane Gross / Larval Wonderpus octopus (Wunderpus photogenicus) drifting in the open ocean at night off Anilao, Philippines.

Shane Gross / Wonderpus octopus (Wunderpus photogenicus) in its juvenile or larval stage. At this stage it is transparent and drifts in the open ocean as plankton. Anilao, Philippines.

Linda Pitkin / 2020VISION / Pink sea fan / Warty coral (Eunicella verrucosa) with attached eggs of a Common squid (Loligo vulgaris), eggcase of a Lesser-spotted dogfish (Scyliorhinus canicula), and Spiny starfish (Marthasterias...

Alex Mustard / Big fin reef squid (Sepioteuthis lessoniana) descends from open water to the reef at night. Arafur Sea, Triton Bay, West Papua, Indonesia.

Alex Mustard / Caribbean reef squid (Sepioteuthis sepioidea) in mid water over a coral reef. East End, Grand Cayman, Cayman Islands, West Indies. Caribbean Sea.

Alex Mustard / Caribbean reef squid (Sepioteuthis sepioidea) North Wall, Grand Cayman, Cayman Islands, West Indies, Caribbean Sea

Alex Mustard / A Caribbean reef squid (Sepioteuthis sepioidea) perches on the hand of a diver. North Wall, Grand Cayman, Cayman Islands, West Indies, Caribbean Sea, April 2008, no release available.

Alex Mustard / The eye of a Pacific giant octopus (Enteroctopus dofleini). Browning Pass, Vancouver Island, British Columbia, Canada

Alex Mustard / Pacific giant octopus (Enteroctopus dofleini) hunts for food on a colourful reef in Browning Pass, Vancouver Island, British Columbia, Canada

Alex Mustard / Common Sydney octopus (Octopus tetricus) detail of eyes. Sydney Harbour. New South Wales, Australia

Alex Mustard / 2020VISION / Stout bobtail squid (Rossia macrosoma) on the seabed, Loch Creran, Scotland, UK, June.

Paul D Stewart / Illustration of Giant Octopus (Octopus dofleini) attacking a ship, 1815 copperplate engraving from Bertuch's 'Bilderbuch fur kinder' 16 plate 5. with contemporary colour. 'Colosal Polypus' (octopus) a...

Solvin Zankl / Wing-armed squid (Stenoteuthis pteropus) - deep sea specimen from South Atlantic

Alex Mustard / 2020VISION / Pair of Common cuttlefish (Sepia officinalis), female in foreground and male behind, note circular mating scars on female caused by the males suckers, Babbacombe Bay, Torbay, Devon, UK, May. Did you k...

Alex Mustard / 2020VISION / Pair of Common cuttlefish (Sepia officinalis), female in front of male, during spring spawning season, Babbacombe Bay, Torbay, Devon, UK, May

Alex Mustard / 2020VISION / Two male Common cuttlefish (Sepia officinalis) compete for a female (on right) during courtship, Torbay, Devon, UK, May. 2020VISION Exhibition. 2020VISION Book Plate. Did you know? Cuttlefish have an...

David Fleetham / Day / Common Reef Octopus (Octopus cyanea) swimming. Hawaii.

Jeff Rotman / Close up of eye of Giant Pacific Octopus (Enteroctopus dofleini), British Columbia, Canada, Pacific Ocean.

Solvin Zankl / Octopus (Octopus vulgaris), close up of eye, San Pietro Island, Sardinia, Italy, Mediterranean, July

Brandon Cole / Pacific Giant Octopus (Enteroctopus dofleini) interacts with scuba diver. British Columbia, Canada, Pacific Ocean. Model released.

Brandon Cole / Pacific Giant Octopus (Enteroctopus dofleini). British Columbia, Canada, Pacific Ocean, September.

Brandon Cole / Pacific Giant Octopus (Enteroctopus dofleini) tentacles while swimming. British Columbia, Canada, Pacific Ocean, September.

Brandon Cole / Pacific Giant Octopus (Enteroctopus dofleini) against dark water. British Columbia, Canada, Pacific Ocean, September.

Jurgen Freund / Blue-ringed octopus (Hapalochlaena lunulata) swimming through water, Batangas, Philippines

Jurgen Freund / Pfeffer's flamboyant cuttlefish (Metasepia pfefferi) hunting over coral reef, Batangas, Philippines.

Jurgen Freund / Coconut / Veined octopus (Octopus marginatus) in its shell home. Lembeh Strait, North Sulawesi, Indonesia.

Jurgen Freund / Coconut / Veined octopus (Octopus marginatus) ready to flee from its coconut shell home. Lembeh Strait, North Sulawesi, Indonesia.

Jurgen Freund / Coconut / Veined octopus (Octopus marginatus) ready to flee from its coconut shell home. Lembeh Strait, North Sulawesi, Indonesia.

Jurgen Freund / Poison ocellate octopus (Octopus mototi) on seabed. Lembeh Strait, North Sulawesi, Indonesia

Jurgen Freund / Coconut / Veined octopus (Octopus marginatus) hiding in its shell home. Lembeh Strait, North Sulawesi, Indonesia.

Jurgen Freund / Coconut / Veined octopus (Octopus marginatus) hiding in its shell home. Lembeh Strait, North Sulawesi, Indonesia.

Jurgen Freund / Coconut / Veined octopus (Octopus marginatus) hiding in its bottle cap home, using a shell as a door. Lembeh Strait, North Sulawesi, Indonesia.

Jurgen Freund / Coconut / Veined octopus (Octopus marginatus) in a bottle cap getting a new shell to use as its home. Lembeh Strait, North Sulawesi, Indonesia.

Jurgen Freund / Coconut octopus / Veined octopus (Octopus marginatus) in its shell home. Lembeh Strait, North Sulawesi, Indonesia.

Jurgen Freund / Coconut octopus / Veined octopus (Octopus marginatus) in its shell home. Lembeh Strait, North Sulawesi, Indonesia.

Jurgen Freund / Tropical blue-ringed octopus (Hapalochlaena lunulata) hunting. Lembeh Strait, North Sulawesi, Indonesia.

Jurgen Freund / Coconut octopus / Veined octopus (Octopus marginatus) in its shell home. Lembeh Strait, North Sulawesi, Indonesia.

Jurgen Freund / Coconut octopus / Veined octopus (Octopus marginatus) in its shell home. Lembeh Strait, North Sulawesi, Indonesia.

Tim Laman / Pfeffer's Flamboyant Cuttlefish (Metasepia pfefferi) West Papua, Indonesia, April 2007

David Fleetham / Common reef octopus (Octopus cyanea), Hawaii.