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...

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

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

Jeff Rotman / Giant Pacific octopus squirting ink at diver, British Columbia Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) squirting ink in defense as it jets away, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) female guarding her eggs, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) flaring out its arms as it settles to the ocean bottom after swimming, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) flaring out its arms as it prepares to drop to the ocean bottom after swimming, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) eggs and newborn, Victoria, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) eggs and newborn, Victoria, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) scavenging on a dead Blue Dog (Squalus acanthias), Campbell River, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) using its suction discs to hold two crabs it has caught, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) scurrying across the ocean floor as it forages for crabs, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) eggs, Victoria, British Columbia, Canada

Jeff Rotman / Giant Pacific octopus (Octopus dofleini) British Columbia Model released.

Jeff Rotman / Giant Pacific octopus (Octopus dolfeini) jets away. British Columbia Model released.

Todd Mintz / Giant Pacific octopus (Enteroctopus dofleini) Port Hardy, British Columbia, Canada.

Todd Mintz / Giant Pacific octopus (Enteroctopus dofleini) Port Hardy, British Columbia, Canada.

Todd Mintz / Giant Pacific octopus (Enteroctopus dofleini) Port Hardy, British Columbia, Canada.

Todd Mintz / Giant Pacific octopus (Enteroctopus dofleini) Port Hardy, British Columbia, Canada.

Jeff Rotman / Giant pacific octopus (Enteroctopus dofleini) feeding on a Cabazon fish (Scorpaenichthys marmoratus). British Columbia, Canada, North Pacific Ocean.

Jeff Rotman / Giant Pacific Octopus (Enteroctopus dofleini) weighing over 20 Kilos interacting with a diver. Victoria Island, British Columbia, Canada, Pacific Ocean. Model released.

Jeff Rotman / Giant Pacific Octopus (Enteroctopus dofleini) swimming, squirting ink at a diver, British Columbia, Canada, Pacific Ocean. Model released.

Jeff Rotman / Close up of suckers on the tentacles of Giant Pacific Octopus (Enteroctopus dofleini) British Columbia, Canada, Pacific Ocean.

Jeff Rotman / Close up of Giant pacific octopus (Octopus dofleini) crawling along the seabed, British Columbia, Canada, Pacific

Jeff Rotman / Giant pacific octopus (Octopus dofleini) crawling along the seabed, British Columbia, Canada, Pacific

Sue Daly / Giant Pacific octopus (Octopus / Enteroctopus dofleini) on seabed, Pacific ocean, Canada, August

Jeff Rotman / 20 Kilo Giant Pacific Octopus (Octopus dofleini) parachutes down on prey, North Pacific ocean, Canada Model released.

Jeff Rotman / Giant Pacific Octopus (Octopus dofleini) resting on rocks. Canada, Pacific Ocean.

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) eight kilograms with four foot arm span, squeezing out though a hole 50 millimeters x 100 millimeters, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) eight kilograms with four foot arm span, squeezing, out through a hole 50 millimeters x 100 millimeters, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) eight kilograms with four foot arm span, squeezing out though a hole 50 millimeters x 100 millimeters, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) eight kilograms with four foot arm span, squeezing out though a hole 50 millimeters x 100 millimeters, Quadra Island, British Columbia, Canada

Nature Production / Giant Pacific Octopus {Octopus dofleini} hectocotylized arm used for transferring sperm, close-up, Fukui, Japan

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) that is sitting upon the pilings of a dock with diver, Campbell River, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) entrance to den is littered with discarded Abalone shells from its previous meals, Hurst Island, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) and diver, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) swimming with diver, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) swimming with diver, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) couple mating, a smaller red male on top of a much larger grey female, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) couple mating, smaller red male on top of a much larger grey female, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) scavenging on a dead Blue Dog (Squalus acanthias), Campbell River, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) scavenging on a dead Blue Dog (Squalus acanthias), Campbell River, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) scavenging on a dead Blue Dog (Squalus acanthias), Campbell River, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) foraging on ocean bottom in a sea grass bed, Quadra Island, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) scurrying across the ocean floor as it forages for crabs, Quadra Island, British Columbia, Canada

Jeff Rotman / Scientist holds Giant pacific octopus weighing 30 kg {Octopus dofleini} BC, Canada British

Jeff Rotman / Giant pacific octopus being tagged {Octopus dofleini} British Columbia, USA

Jeff Rotman / Common reef octopus descends on prey. (Octopus cyaneus) Red Sea Egypt

Jeff Rotman / Close up of suckers of Giant pacific octopus {Octopus dofleini} BC, Canada British

Jeff Rotman / Giant octopus and diver. British Columbia.

Jeff Rotman / Close-up of eye of Giant pacific octopus {Octopus dofleini} Pacific, Canada

Jeff Rotman / Male sex organ on tentacle of Giant Pacific octopus {Octopus dofleini} Canada

Jeff Rotman / 20-kilo Giant Pacific octopus parachuting past diver {Octopus dofleini} British Columbia, Canada Model released.

Jeff Rotman / Giant Pacific octopus jetting away (Octopus dofleini) British Columbia, North Pacific

Jeff Rotman / Close-up of suckers on arms of giant Pacific octopus (Octopus dolfeini) Pacific off Canada

Jeff Rotman / Giant pacific octopus (Octopus dofleini) holding fish prey with sucker

Jeff Rotman / Giant pacific octopus eating Cabizon fish. (Octopus dofleini) Pacific off British Columbia.

Jeff Rotman / Close-up of eye of Giant pacific octopus. (Octopus dofleini) Pacific off British Columbia, North America

Jeff Rotman / Diver waching Giant Octopus (Octopus dofleini) swimming, Pacific off British Columbia, North America Model released.

Jeff Rotman / Eye of Giant Octopus (Octopus dofleini) British Columbia

Jeff Rotman / Eye of Giant Octopus (Octopus dofleini) temperate Pacific, off Canada, North America

Jeff Rotman / Giant Octopus (Octopus dofleini) jets away, Pacific off British Columbia, North America

Jeff Rotman / Giant Octopus (Octopus dofleini) jets away from diver. Pacific, off British Columbia, Canada, North America

Jeff Rotman / Siphon of Giant Octopus (Octopus dofleini) British Columbia

Jeff Rotman / Suckers on arm of Giant Octopus (Octopus dofleini) British Columbia

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) being weighed and tagged by biologist Jim Cosgrove, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) dead female with unhatched eggs with marine biologist Jim Cosgrove, Saanich Inlet, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) weighed and tagged to track growth rate is being released by biologist Jeannie Cosgrove, British Columbia, Canada

Fred Bavendam / Pacific Giant Octopus (Enteroctopus dofleini) weighed and tagged for growth rate by biologist Jim Cosgrove, British Columbia, Canada