Nightfall, I understand that from measurements of scars on sperm whales (which hunt giant squid), and from recovered body parts washed up on beaches, scientists postulate that giant squid may grow to over 100 feet in length. However, you needn't be scared of them... they live in very, very deep water (this one was photographed nearly 3,000 feet down), and if you find yourself that deep in the water, without a submarine around you to protect you, I assure you that being eaten by a giant squid will be the least of your concerns!