The Giant Squid: Myths, Theories, and Sightings

Few creatures have captured human imagination quite like the giant squid. Elusive and incredibly powerful, it has long been the inspiration behind sea monster legends and maritime myths. For centuries, sailors told tales of enormous tentacled beasts rising from the deep to drag ships under the waves. Today, science confirms that giant squids are real; yet, much about them remains hidden beneath the ocean’s dark surface.

If you’ve ever wondered whether these legends hold truth, or when the giant squid was discovered, this article will take you through everything you need to know, from myth to modern discovery.

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The giant squid (Architeuthis dux) is one of the largest invertebrates on Earth, capable of growing up to 13 metres long. Its body is built for life in the deep ocean, with a torpedo-shaped mantle, eight arms, and two longer feeding tentacles lined with powerful suckers. These tentacles help it capture prey such as fish and smaller squids, which it draws towards its beak-like mouth.

Despite its size, the giant squid remains one of the least understood animals on the planet. Because it lives in the deep ocean, sightings are incredibly rare, and much of what scientists know comes from carcasses washed ashore or caught in deep-sea nets.

In Norse mythology, the giant sea monster known as the Kraken was said to dwell off the coast of Norway and Greenland. Descriptions of the Kraken match many details of the modern giant squid, and the name “Kraken” itself has since become synonymous with the idea of a giant sea creature lurking in the deep.

These myths likely arose from real encounters. When large squids or parts of their bodies surfaced, early sailors, who were unfamiliar with such animals, may have mistaken them for supernatural beings. Over time, the stories grew more dramatic, feeding into centuries of maritime folklore.

Many believed the giant squid was a sailor’s exaggeration, a figment of imagination inspired by fear of the unknown. Early reports described squid monsters attacking boats, wrapping their tentacles around ships, and dragging them beneath the waves. This led people to believe that the Giant Squid was a cryptid – a creature whose existence is unproven by science.

Today, we know these creatures are real. Scientists confirmed their existence in the 19th century when physical remains, including tentacles and entire specimens, began washing ashore.

For years, scientists debated whether such a creature could exist at all. Before photographic proof, some believed the stories were confused sightings of whales and other marine animals.

Modern theories focus on how these creatures survive in the ocean’s harshest environments. The giant squid’s huge eyes, for example, help it detect movement in almost complete darkness, particularly the bioluminescent glow of predators like sperm whales. Others believe their massive size evolved as an adaptation to the deep-sea “gigantism” phenomenon, where cold, high-pressure conditions favour large body forms.

The first confirmed scientific description of the giant squid came in the mid-19th century. In 1857, Danish naturalist Japetus Steenstrup analysed beached remains and formally identified the species Architeuthis dux. This marked the transition of the giant squid from myth to measurable fact.

In 2004, researchers captured the first-ever photographs of a living giant squid in its natural habitat, followed by video footage in 2012. These giant squid photos offered the world a rare glimpse of this mysterious animal alive in the deep.

Although sightings are rare, the few documented encounters have amazed scientists and the public alike. The first known footage showed a giant squid wrapping its long tentacle around a camera in the deep ocean. Later expeditions recorded similar images, revealing its graceful, almost alien movement.

In history, reports of giant squid attacks on ships have circulated. While there is no verified evidence of a giant squid attack, the stories likely originated from encounters with dying or stranded squids struggling at the surface.

Giant squids are not known to attack humans. While their suckers and beaks are formidable, they live in deep-sea regions far beyond human reach. Most squid attacks on humans involve smaller, more aggressive species encountered by divers.

The deep ocean is one of the most inaccessible places on Earth. Giant squids live thousands of metres below the surface, where sunlight cannot reach. This makes studying them incredibly challenging.

They are rarely caught because they move slowly and inhabit areas too deep for fishing nets. When they do surface, it’s often because they are injured or dying. This explains why we never see giant squid in their natural state, as they prefer the darkness where few creatures dare to go.

The giant squid has been seen alive, though only a few times. The first confirmed live sighting was in 2004 off Japan’s Ogasawara Islands, when researchers captured the first giant squid pictures. Later footage showed a magnificent orange-red squid swimming gracefully in the deep. These rare sightings confirm that such creatures, once thought mythical, are very real indeed.

The largest giant squid ever recorded measured around 13 metres in length, including its tentacles. However, reports from the past suggest that even larger specimens may have existed.

The giant squid often shares the spotlight with its close relative, the colossal squid (Mesonychoteuthis hamiltoni). Although shorter in length (around 10–12 metres), the colossal squid is heavier and more muscular, with thicker tentacles and larger eyes.

In a comparison between the two, the colossal squid wins for sheer mass, while the giant squid holds the record for longer tentacles and overall reach. Both species remain extremely elusive, seen alive only a handful of times.

Here are some facts about the Giant Squid to spark your curiosity:

While smaller squid species are commonly eaten around the world, the giant squid is not edible. Its flesh contains high levels of ammonia, which helps keep its body buoyant in the ocean but gives it an unpleasant taste and smell. For this reason, the giant squid is unsuitable for human consumption.

Although it’s highly unlikely you’ll ever meet one, it’s interesting to wonder what to do if a giant squid grabs you. In reality, survival would be nearly impossible in the depths where it lives. But hypothetically, struggling or cutting free from its tentacles would be the only chance, as their suction cups and sharp rings can cause deep wounds.

Thankfully, such encounters are purely theoretical. The giant squid’s natural environment is far deeper than where humans typically venture, even in submersibles.

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