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...

Norbert Wu / Humboldt Squid (Dosidicus gigas) reaches five feet and 50 pounds, a voracious carnivore, Sea of Cortez, Baja California, Mexico

Conrad Maufe / Nigel Marven with Giant squid washed up on beach {Architeuthis sp} Tasmania, Australia

Mark Carwardine / Aerial view of Sperm whale feeding, possibly on giant squid, Mexico

Norbert Wu / Humboldt Squid (Dosidicus gigas) close-up of suckers lined with razor-sharp teeth, Sea of Cortez, Baja California, Mexico

Norbert Wu / Humboldt Squid (Dosidicus gigas), Sea of Cortez, Baja California, Mexico

Conrad Maufe / Dead Giant squid washed up on beach {Architeuthis sp} Tasmania, Australia

Conrad Maufe / Giant squid washed up on beach {Architeuthis sp} Tasmania, Australia (set-up for filming)

Conrad Maufe / Nigel Marven with Giant squid washed up on beach {Architeuthis sp} Tasmania Australia