There's nothing like spending the day looking at something no other human has ever seen
Nearly two kilometres beneath the Pacific, where light has never reached and human eyes have rarely looked, a creature the size of a golf ball has quietly rewritten the boundaries of known life. In 2015, researchers near the Galapagos Islands filmed a tiny blue octopus that would take a decade to formally name — Microeledone galapagensis — a species so unusual its nearest known relative lives in an entirely different ocean. Its discovery reminds us that the deep sea remains one of Earth's last great silences, still full of answers to questions we have not yet thought to ask.
- A submersible camera caught a golf ball-sized, glowing blue octopus at 1,800 metres depth near the Galapagos — and scientists immediately knew they were looking at something unknown to science.
- With only a single preserved specimen in existence, the usual path of dissection was off the table, creating both a scientific constraint and an ethical reckoning about how to study something irreplaceable.
- Researchers turned to CT scanning technology, generating thousands of X-ray images to build a full 3D interior map of the creature — a method that preserved the specimen while unlocking its secrets.
- The octopus's rare blue-and-purple colouration appears to be a survival strategy, using dark webbing to smother the bioluminescent glow of captured prey and hide from predators drawn to that light.
- Formally named and published in 2026, Microeledone galapagensis now stands as the smallest known member of a family whose other species live near Antarctica and grow far larger — a biological outlier in its own family tree.
In the darkness nearly two kilometres below the Pacific, a submersible camera caught something small and luminous near Darwin Island in 2015 — a golf ball-sized octopus, brilliant blue, belonging to a species science had never recorded. The team from the Charles Darwin Foundation had found something genuinely new, though it would take years before the world would know it.
Octopus specialist Janet Voight of Chicago's Field Museum of Natural History was eventually brought in to lead the identification. Working first from photographs, then from a preserved specimen that arrived by mail, she was struck immediately by its beauty and strangeness — its closest known relative lives off Uruguay, in a different ocean entirely. Formal identification normally demands dissection, but with only one specimen available, Voight's team chose CT scanning instead, producing thousands of X-ray images and assembling a complete three-dimensional model of the animal's interior without ever cutting it open.
The creature's blue colouration is extraordinarily rare in nature, and its deep purple underside appears to serve a precise purpose: when the octopus catches bioluminescent prey, it drapes its dark webbing over the glowing body, concealing both the light and itself from larger predators. Its stubby arms and single rows of suckers further distinguish it from familiar octopus species. It is the smallest known member of the Megaleledonidae family, whose other species inhabit Antarctic waters and grow considerably larger.
Formally named Microeledone galapagensis and published in the journal Zootaxa in 2026, the octopus joins a growing list of deep-sea discoveries that arrive with quiet regularity as researchers venture into unmapped ocean territory. Voight herself had identified another new species just three years earlier. The Pacific Ocean floor alone dwarfs all of Earth's landmass combined — and the depths, still largely unknown, almost certainly hold many more creatures waiting to be found.
In the darkness nearly two kilometres below the surface of the Pacific, a submersible's camera caught something that made a scientist gasp. "He's tiny! It's blue!" The creature on the monitor was no larger than a golf ball, and its body glowed the colour of deep ocean water. What the team from the Charles Darwin Foundation had stumbled upon in 2015 near Darwin Island was a species of octopus that science had never documented before.
It took years for the discovery to move from footage to formal identification. Janet Voight, an octopus specialist at the Field Museum of Natural History in Chicago, was eventually brought in to examine the animal. At first she worked from photographs alone, but when the preserved specimen arrived by mail, her reaction was immediate and unguarded. "When it arrived, I was like 'Oh! My goodness! It's beautiful'," she told the news agency AFP. What struck her most was the animal's shape. The closest relative she knew of lived off the coast of Uruguay—on the opposite side of South America, in a different ocean entirely. This was something genuinely new.
Normally, identifying a new octopus species requires dissection. Scientists need to examine the mouth, the beak, the teeth, the internal architecture. But Voight faced a constraint that became an advantage: there was only one specimen. Rather than cut it open, she and her team at the Field Museum turned to CT scanning technology. They generated thousands of X-ray images, then assembled them into a three-dimensional digital model of the creature's interior. "There's nothing like spending the day looking at something no other human has ever seen," said Stephanie Smith, the lab's head of X-ray imaging. The octopus was formally named Microeledone galapagensis and published in the journal Zootaxa in 2026.
What makes this octopus remarkable extends beyond its size. The blue colouration itself is vanishingly rare in nature. Underneath, the animal's skin shifts to a deep purple—a colour scheme that Voight believes serves a specific survival purpose. When the octopus captures prey that produces light, that bioluminescence could attract larger predators looking for an easy meal. By draping its dark-coloured webbing over the glowing prey, the octopus hides both the light and itself. The animal's other distinguishing features are equally unusual: stubby, abbreviated arms with only a single row of suckers, characteristics that set it apart from most octopuses humans are familiar with. It appears to be the smallest member of the Megaleledonidae family, a group whose other species inhabit the frigid Southern Ocean around Antarctica and grow considerably larger.
The discovery, while striking, is not anomalous in the deep sea. New octopus species turn up with surprising regularity in unexplored regions of the ocean floor. Voight herself had identified another new species just three years earlier, off Costa Rica. The sheer scale of unmapped ocean makes such finds almost inevitable. "If you took all the land on Earth and pieced it together, you would not cover the Pacific Ocean," Voight noted. The vast majority of the seafloor remains unknown to science. A golf ball-sized octopus, brilliant blue and purple, living in near-total darkness nearly two kilometres down—it is almost certainly not the last creature waiting to be found in those depths.
Citas Notables
When it arrived, I was like 'Oh! My goodness! It's beautiful'— Janet Voight, octopus expert at the Field Museum of Natural History
If you took all the land on Earth and pieced it together, you would not cover the Pacific Ocean— Janet Voight, on the scale of unexplored ocean floor
La Conversación del Hearth Otra perspectiva de la historia
Why did they decide not to dissect this octopus when that's normally how you identify a new species?
Because there was only one specimen. Once you cut it open, it's gone. Voight made the choice to preserve it, which meant finding another way to see inside.
And CT scanning worked?
Completely. They got thousands of X-ray images and built a 3D model from them. You can see the internal structure without destroying the animal. It's a newer approach, but it saved this one.
The colour—blue and purple underneath. That's not just pretty, is it?
No. It's camouflage. When the octopus catches something that glows, it covers it with that dark webbing. Otherwise the light attracts predators. The colour pattern is survival.
How common is it to find new octopus species?
More common than you'd think, especially in the deep sea. Most of the ocean floor has never been explored. Voight found another new species just three years before this one, off Costa Rica.
So there are probably hundreds more down there?
Probably thousands. We've barely looked. The ocean is incomprehensibly large—larger than all the land on Earth combined.
What happens to this specimen now?
It stays preserved at the Field Museum. It's the only one we have. That's why they scanned it instead of taking it apart.