In an astonishing breakthrough for marine research, the colossal squid—the largest squid species on the planet—has been filmed swimming in its natural deep-sea environment for the very first time!

This magnificent creature can grow up to a staggering 23 feet and weigh an incredible 1,100 pounds, making it the heaviest invertebrate on Earth. However, the squid captured on video was a juvenile, measuring just a foot long.

Filming took place on March 9 near the South Sandwich Islands in the South Atlantic Ocean, at depths of nearly 2,000 feet, as part of a 35-day expedition aimed at uncovering new marine life, according to the Schmidt Ocean Institute. Using their remotely operated vehicle, SuBastian, scientists aboard the research vessel Falkor recorded this groundbreaking footage.

The colossal squid, scientifically known as Mesonychoteuthis hamiltoni, was officially identified back in 1925. This footage marks a monumental first—it’s the first time this incredible species has been seen alive at such depths.

While adult squids lose their transparent bodies, previous encounters have largely consisted of examining remains found in the stomachs of whales and seabirds or as predators of commercially harvested fish. Kat Bolstad from Auckland University of Technology expressed her excitement about the footage, stating, "It’s thrilling to view this juvenile colossal squid in its habitat, especially considering they have no idea humans exist!"

But that’s not all! During a previous expedition in January, researchers also filmed the glacial glass squid (Galiteuthis glacialis), another elusive species that had never before been seen alive in its natural environment. These discoveries open up exciting avenues for future research, shedding light on the mysteries of our oceans.