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Here’s what you’ll learn when you read this story:
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The Antarctic gonate squid, Gonatus antarcticus, had never been seen alive in the ocean until 2024, when it was filmed by an ROV late in the year. That footage has finally been released
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All that was known about this creature—which was first discovered in 1898—came from dead specimens that showed up in fishing nets.
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If it wasn’t for hazardous weather that forced the expedition to stop short of the area it planned to cover, Gonatus antarcticus might have slipped into the darkness unnoticed.
Far beneath the glaciers and ice floes of the Weddell Sea are dark Antarctic waters that have gone mostly uninfluenced by humans. Thousands of feet down lurk bizarre creatures: slithering deep-sea ribbon worms, siphonophores, sea pigs, and a species of squid that had never been seen alive until centuries after it first washed up on the shore.
On board the Schmidt Ocean Institute’s research vessel Falkor (too) in December of 2024, a team of scientists were exploring the Weddell Sea at depths of about 7,000 feet with the ROV SuBastian when they saw a flash of red in the darkness. Right at the edge of the Powell basin, SuBastian captured video footage of a massive squid drifting by and releasing a cloud of greenish ink. For the next few minutes, the squid floated around SuBastian, and the team managed to turn down the ROV’s lights (to get an idea of how the squid interacts with its environment) and measure the creature using lasers before it shot away into the shadows.
The squid sighting caught the attention of environmental scientist Kat Bolstad of Auckland University in New Zealand. When she later reviewed the video, she was able to identify the creature as Gonatus antarcticus, the elusive Antarctic gonate squid.
“This is, to the best of my knowledge, the first live footage of this animal worldwide,” Bolstad told National Geographic.
Gonatus antarcticus had been discovered by Einar Lönnberg—a Swedish zoologist who had gone on an expedition to Tierra del Fuego—at the extreme southern tip of South America in 1898. He first discovered a deceased specimen stranded in the Strait of Magellan, and collected already dead specimens that had been entangled in fishing nets. Closer study revealed that the squid showed significant differences from close cousin Gonatus fabricii, which was the only known Gonatus species at the time. It was only from these observations (and beaks of the animal lodged in the stomachs of predators) that Lönnberg and the scientists who followed him were able to find out anything about this mysterious squid.
Lönnberg described the new species of squid he discovered as having a “very slender mantle, very long tail, and soft body” with “long, narrow fins, long stout tentacles and small tentacle clubs.” Its arms were “short, thick and muscular” while its tentacles were “long with relatively small club[s], large central hook[s] and medium-size distal hook[s].”
At three feet long, the Antarctic gonate squid may not grow to the enormity of the giant squid or the equally-ellusive colossal squid (which was also first seen alive by SuBastian in January of 2025), but it is still a rare find. So little is known about the numbers and whereabouts of these cephalopods that it is difficult to gauge how many populate the Southern Sea. What G. antarcticus does have in common with its larger cousins, however, is its red coloration, which is actually a clever type of camouflage shared by many creatures in the twilight and midnight zones. Wavelengths of red light cannot penetrate waters so deep, so they appear black and just about invisible to predators.
It seemed that the squid on SuBastian’s footage had possibly gotten into a scuffle with something larger—possibly a colossal squid, based on the scratches along its mantle that suspiciously resembled hook marks.
The squid might have never been discovered if it hadn’t been for hazardous weather conditions that Christmas Eve. On an expedition sponsored by the National Geographic Society as a part of their Rolex Perpetual Planet Ocean Expeditions partnership, the team was planning to look into the unexplored Powell Basin—an abyssal plain that reaches nearly ten thousand feet deep. But an onslaught of ice made them rethink their plans, and they decide to drop SuBastian just outside the basin instead.
“What are the odds?” researcher Manuel Novillo from Instituto de Diversidad y Ecología Animal (who was also a member of Bolstad’s team) told National Geographic. “We were not supposed to be there and not at that precise moment.”
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