Scientists Capture First-Ever Footage Of Elusive Colossal Squid After 100 Years Of Mystery

A creature that can grow as long as a bus and weigh up to 500 kilograms has finally been filmed swimming freely in the deep ocean. Scientists have captured the first-ever footage of a juvenile colossal squid in its natural environment, ending a century-long wait to see the mysterious animal alive beneath the waves.

The extraordinary encounter happened near the remote South Sandwich Islands in the South Atlantic Ocean, where researchers spotted the tiny squid at a depth of 600 meters. Measuring just 30 centimeters, the juvenile looked remarkably different from the enormous creature it could eventually become. The discovery has given scientists a rare opportunity to observe one of the ocean’s least understood animals.

Scientists Finally Capture A Living Colossal Squid

The remarkable footage was recorded in March during a 35-day expedition dedicated to finding and documenting marine life. A research team led by University of Essex academic Dr. Michelle Taylor was exploring the waters around the South Sandwich Islands aboard the Schmidt Ocean Institute’s research vessel, Falkor (too), when a remotely operated underwater vehicle encountered something unusual.

At first, the scientists were unsure what they had discovered. The small, transparent-looking animal caught their attention because of its unusual appearance, prompting the team to record it before establishing exactly what species they were observing. Dr. Taylor described the creature as “beautiful and unusual”, explaining why the researchers decided to capture the encounter on camera.

The footage was subsequently examined and verified by Dr. Kat Bolstad, confirming that the animal was a juvenile colossal squid. This made the recording the first known footage of a living member of the species in its natural underwater environment. The timing also made the discovery particularly significant, as it happened during the 100-year anniversary of the colossal squid first being identified and named.

For researchers who had spent decades learning about the animal through limited physical evidence, seeing one swimming freely was an extraordinary opportunity. The juvenile was only around 30 centimeters long, but its potential adult size makes the encounter even more fascinating. Scientists believe colossal squid can eventually reach seven meters in length and weigh as much as 500 kilograms.

The Colossal Squid Can Grow To An Astonishing Size

Despite being relatively small when first discovered as a juvenile, the colossal squid is considered one of the most extraordinary animals living in the deep ocean. Experts believe mature specimens can reach approximately 23 feet in length and weigh up to 1,100 pounds, making them the heaviest invertebrates on the planet.

Invertebrates are animals without backbones, a category that includes octopuses, jellyfish, insects, and many other creatures. The colossal squid belongs to the mollusc family and has eight arms, with a distinctive feature that separates it from several other squid species. Hooks are present along the middle of its arms, giving researchers an important physical characteristic to look for when identifying it.

The difference between the juvenile filmed during the expedition and its possible adult appearance is particularly interesting. Young colossal squid have transparent bodies, which eventually change as they mature. Scientists still know relatively little about how this transformation happens or how the animal develops throughout its life.

The recent footage therefore provides more than an unusual glimpse of a rare sea creature. It gives researchers a chance to study the animal during an early stage of development, something that has been difficult because of the scarcity of direct observations. Understanding how the juvenile changes as it grows could help answer questions about the species that have remained unresolved for generations.

Why The Juvenile’s Appearance Is So Unusual

The transparent appearance of young colossal squid makes them difficult to compare with the enormous adults most people associate with the species. Their early appearance also provides clues about their development, although researchers still have much to learn about the different stages of their lives.

As the animals mature, they lose their transparent appearance and develop the physical characteristics associated with adult colossal squid. Their distinctive arm hooks are another feature that makes the species particularly unusual among marine creatures.

Scientists Have Mostly Found Their Remains Inside Predators

For decades, researchers have struggled to observe colossal squid alive. Many previous discoveries have involved remains recovered from the stomachs of whales and seabirds, leaving scientists with limited opportunities to understand how the animals behave in their natural surroundings.

Dr. Kat Bolstad explained that earlier encounters had largely come from examining the remains of squid eaten by predators. Although these discoveries helped establish the species’ physical characteristics, they offered little information about how a living colossal squid moves through the deep ocean.

Dr. Bolstad described the new recording as an exciting moment for marine research, saying: “It’s exciting to see the first in situ footage of a juvenile colossal and humbling to think that they have no idea that humans exist.”

The comment captures just how unusual the encounter was. The juvenile was swimming hundreds of meters below the surface in an environment where human activity is extremely limited. Meanwhile, the researchers were observing a species that had remained largely hidden from direct human observation for an entire century.

Adults have previously been filmed by people involved in fishing activities, particularly when dying specimens were encountered. However, those recordings did not provide the same opportunity to watch a living colossal squid moving through its natural habitat. The latest footage fills an important gap, although much about the species remains unknown.

The Expedition Took Scientists Into One Of The Most Remote Areas

The research team was exploring an extremely isolated part of the South Atlantic when the discovery happened. The South Sandwich Islands are surrounded by waters that remain difficult to investigate, making the expedition an opportunity to document marine animals rarely encountered by humans.

The area was so remote that the nearest humans were reportedly hundreds of miles away aboard the International Space Station. Researchers used a remotely operated underwater vehicle to investigate the depths, allowing them to explore parts of the ocean that would otherwise be difficult to reach.

The vehicle was responsible for spotting the juvenile colossal squid at approximately 600 meters below the surface. Without this technology, observing such a small animal in such a vast underwater environment would have been considerably more difficult.

The 35-day mission was focused on discovering marine life, and the colossal squid became one of its most significant encounters. The team also recorded another unusual squid species during a separate expedition, providing researchers with even more evidence of how much remains undiscovered beneath the Southern Ocean.

Another Rare Squid Was Filmed For The First Time

The colossal squid was not the only remarkable animal researchers managed to record. Scientists also revealed that they captured the first-ever footage of a glacial glass squid in January, offering another rare look at a creature that had previously escaped direct observation.

The glacial glass squid has a distinctive transparent body, with an orange tint visible across its upper half. Its appearance is very different from that of the colossal squid, demonstrating the unusual variety of creatures inhabiting the deep Southern Ocean.

Dr. Jyotika Virmani, executive director of the Schmidt Ocean Institute, described the discoveries as remarkable because researchers encountered two different squid species during back-to-back expeditions.

“The first sighting of two different squids on back-to-back expeditions is remarkable and shows how little we have seen of the magnificent inhabitants of the southern ocean,” she said.

The discoveries have highlighted how much marine life remains beyond the reach of ordinary observation. Even with advanced underwater equipment, scientists continue to encounter species that are rarely seen alive. The two squid recordings provide valuable opportunities to study animals that have remained difficult to document.

Scientists Still Do Not Know How Many Colossal Squid Exist

Although the latest discovery has provided an important breakthrough in observing the species, researchers still face a major problem when trying to understand its global population. The Natural History Museum has previously explained that the lack of sightings makes it extremely difficult to estimate how many colossal squid live in the world’s oceans.

In 2022, the institution described the animals as creatures that still “straddle the line between legend and reality”. That description reflects the unusual position of a species known to science for a century, yet rarely observed in its natural environment.

Several unanswered questions continue to make research difficult:

• Population numbers: Scientists cannot reliably estimate how many colossal squid exist worldwide.
• Life cycle: Researchers still have limited information about how the animals develop from juveniles into adults.
• Adult behaviour: Living adults have rarely been observed moving freely in their natural habitat.
• Physical development: The transformation from a transparent juvenile into a mature colossal squid remains poorly understood.
• Natural habitat: More observations are needed to understand where the animals live and how they behave at different depths.

The newly recorded juvenile offers researchers a valuable starting point, but one sighting cannot answer every question surrounding the species. Scientists need further observations to build a clearer understanding of its development and behaviour.

A Century After Its Discovery, The Colossal Squid Remains A Mystery

The timing of the footage makes the discovery particularly memorable. Exactly 100 years after the colossal squid was first identified and named, researchers finally captured a living juvenile swimming in its natural environment.

For much of that century, scientists have relied on physical remains and occasional encounters to understand the enormous invertebrate. The new recording offers something they have rarely had: an opportunity to observe the animal alive rather than reconstruct its existence from specimens.

The juvenile may have measured only 30 centimeters, but its discovery has opened another window into a species that could eventually grow to seven meters long. Somewhere in the deep Southern Ocean, adult colossal squid may be moving through waters that humans have barely explored. Researchers now have their first confirmed footage of a living juvenile to help guide the search for answers.