Every few days this month, the deep sea gave up another animal nobody had named. A worm with suction cups. A sea cucumber with horns. A crustacean shaped like a woodlouse and longer than a school ruler. What caught our attention is where several of them were actually found: in a specimen tray, a jar of alcohol, a university drawer in Germany. The ocean’s newest animals are being discovered twice, once at the bottom of the sea and again, sometimes decades later, by someone who finally takes a close look.
So we went down to meet them. What follows is a descent from the surface to the floor of the deepest trench on Earth, with this month’s discoveries placed roughly where they live, alongside some of the most beautiful photographs ever taken down there. Keep scrolling and the water gets darker, the way it really does.
New from the deep, October 2026
- 57 new species and five new genera from a single submarine canyon off Argentina, confirmed October 1.
- A giant isopod, 32.2 cm long, named as a new species after decades as a teaching specimen in a German university collection.
- A new genus of deep-sea worm with sucker-like structures on its belly, announced this week by the Australian Museum.
- 1,121 new marine species identified by the Ocean Census in one year, most of them from specimens already sitting in collections.
Our route, top to bottom. Depths are in meters; one meter is about 3.3 feet.
0 mThe sunlight zone
Where the light runs out
Almost everything we picture when we say “the ocean” happens in the top 200 meters. There’s enough sunlight here for algae to grow, so this thin bright layer feeds most of the sea. Then the light starts to fail, and it fails by color. Red goes first. That’s why so many deep animals are red: in water with no red light left in it, red looks black.
Below 200 meters there isn’t enough light to grow anything. Everything that lives deeper has to eat what sinks, eat each other, or find another way entirely.
200 mThe twilight zone · 200 to 1,000 meters
A crowd that swims as one
Down here there’s still a little blue light, enough to see by. The animal below was photographed by NOAA near Puerto Rico, and it looks like one long, glowing creature. It isn’t. A siphonophore is a colony, many specialized bodies cloned from a single start, some built to swim, some to feed, some to sting, strung together so closely that they behave like one animal. Some siphonophores grow longer than a blue whale!
This is also where light becomes a language. A long-running survey of midwater animals off California found that roughly three quarters of them could make their own light. They use it as bait, as a warning, as a decoy, and as camouflage: some fish glow faintly from the belly to erase their own silhouette against the dim light above. We’ve written before about the salp that carries a whole ecosystem in its see-through body and the jellyfish that can start its life over. Both are drifters from water like this.
640 m2,100 feet · Gulf of Mexico
A fishing rod for a face
This is a goosefish, Lophiodes beroe, one of the anglerfish, the family that grew a fishing rod out of its own fin. Look at the center of its face and you’ll find the thin stalk of the lure. It doesn’t chase anything. It settles on the bottom, wiggles the bait, and waits with a mouth nearly as wide as the rest of it. NOAA’s team says these fish are fairly common between 600 and 800 meters. Where meals are this rare, waiting costs less than hunting. (We have loved anglerfish for a long time.)
670 mA seamount off the Cocos (Keeling) Islands New this month
The spaghetti worm with suction cups
This week the Australian Museum announced a new genus of marine worm. New deep-sea species turn up all the time. A new genus, a whole new branch above the species level, is much rarer.
The worms came up in a beam trawl from a seamount more than 670 meters down near the Cocos (Keeling) Islands, during voyages on the research ship RV Investigator in 2021 and 2022. At first the catch looked like a single strange organism, a tangle of branching brown tentacles. Then Dr. Elena Kupriyanova noticed small orange spheres tucked among the branches and thought they looked suspiciously like worm eggs. They were! The “branches” were the elaborate tubes the worms build, and out of them came bright orange animals up to 75 millimeters long.
Spaghetti worms normally live in soft mud, sweeping it with long tentacles for scraps. Seamount slopes don’t offer much mud. The researchers think the sucker-like structure on this worm’s underside is how it holds on where there’s little sediment to build in, and that sucker gave the genus its name: Terebellosuctoria, roughly “terebellid with suckers.” The species, T. jimii, honors the scientist Naoto Jimi, who had described similar suckers on another worm.
These animals were collected four and five years ago. The paper came out in July. Most of the world met them this week.
1,400 m4,595 feet · The midnight zone begins at 1,000
The sea cucumber that learned to swim
Past 1,000 meters the sunlight is gone for good. From here down, the only light is the light animals make, and the only weather is marine snow, the slow fall of dead plankton and dust from the bright world above.
The animal on our cover lives here. Pelagothuria natatrix is a sea cucumber, a relative of the lumpy creatures that crawl across reef floors, except this one left the floor behind. It spreads a webbed veil and swims, and at a glance it’s easy to mistake for a jellyfish. NOAA’s Okeanos Explorer filmed it about 1,400 meters down in the central Pacific in 2017, and the team reported seeing many of them on that expedition.
Sea cucumbers also star in this month’s biggest deep-sea story, from a canyon off Argentina.
3,500 mMar del Plata Canyon, Argentina New this month
57 new species from one canyon
In July and August of 2025, the Schmidt Ocean Institute sent its remotely operated vehicle, SuBastian, into the Mar del Plata Canyon off Argentina, a submarine canyon that drops past 3,500 meters, nearly twice as deep as the Grand Canyon. The dives streamed live, and more than four million people tuned in! The crowd favorite was a bright orange sea star that looked exactly like Patrick from SpongeBob. (It turned out not to be a new species.)
The real news took a year. In July, the Ocean Census gathered 20 taxonomists in Buenos Aires to work through the samples, and on October 1 the count came out: 57 new species and five new genera. Twenty of them are copepods, tiny crustaceans, and the team only got through about 10 percent of the copepod samples. Every single specimen they examined was new to science.
The headliner is a sea cucumber the team nicknamed Loki, for the horn-like appendages that reminded them of the Norse trickster god. It belongs to the genus Peniagone and is still waiting on a formal species name, one of up to ten new sea cucumbers from the workshop. The haul also includes a red-orange octocoral filmed on the canyon floor at 1,954 meters and a sea pen collected with SuBastian’s robotic arm. Schmidt Ocean Institute’s photographs of all of them are worth seeing at full size, and a follow-up expedition to a different South Atlantic canyon is planned for February and March 2027.
A drawerUniversity of Tübingen, Germany New this month
The giant in the drawer
Sometime in the 1980s, the paleontologist Dolf Seilacher picked up a dried giant isopod at a research station in Puerto Rico and carried it home to the University of Tübingen as a teaching specimen. And there it stayed.
Giant isopods, the genus Bathynomus, are deep-sea scavengers that look like woodlice built at the wrong scale. When Benedikt Kästle and Ingmar Werneburg finally gave the Tübingen animal a careful look, it measured 32.2 centimeters, big enough to land in the size class Kästle calls the “colossogiants,” and it didn’t match any known species. Last week, in Scientific Reports, they named it Bathynomus tuebingoborikensis, for the town that kept it and for Boríken, the Taíno name for Puerto Rico. Its closest known relative lives off Mexico’s Yucatán Peninsula.
Vents and seepsWherever the seafloor leaks
Where dinner comes up from below
Most deep animals live on what falls from above. But at hydrothermal vents and cold seeps there’s a second menu. Microbes turn chemicals leaking from the seafloor, hydrogen sulfide and methane among them, into food with no sunlight involved, and whole neighborhoods grow up around them: mussels, clams, tube worms, crabs, and the octopuses that hunt them.
The vent above sits on an undersea volcano in the western Pacific. The small octopus below was found much closer to home for a lot of us, among living and dead mussels south of Norfolk Canyon, off the coast of Virginia.
10,935 m35,876 feet · The Challenger Deep
The bottom
Below 6,000 meters the ocean floor stops being a plain and becomes a set of trenches, deep creases where one tectonic plate slides beneath another. At the deepest point we know of, the Challenger Deep in the Mariana Trench, the water presses down with more than a thousand times the pressure you feel standing on a beach. Fish give out a little past 8,000 meters, but other animals carry on all the way to the bottom.
Last year we wrote about the deepest animal communities ever found, clams and tube worms living on chemosynthesis more than 9,000 meters down. If you want a sense of how far that really is, this depth comparison still makes our stomachs drop.
0 mBack on the surface
Found twice
The deep sea is handing over new animals faster than anyone can name them, and the naming, more than the diving, is usually the slow part.
Formally describing a species has historically taken years, and by the Ocean Census’s count about 13.5 years on average. Its network identified 1,121 new marine species between April 2025 and March 2026, and most of them came from specimens that were already sitting in collections, waiting for someone with the right expertise and the time. The worms waited four years. The isopod waited about forty. The coral below was first spotted off Molokaʻi in 2006 and only got its name, Iridogorgia chewbacca, in 2025.
Somewhere right now, an animal nobody has named is sitting in a jar on a museum shelf, waiting to be found a second time.
LiveThe equatorial Atlantic, right now
Watch the next dive
The Schmidt Ocean Institute’s ship, Falkor (too), is in the middle of the Atlantic as we write, on an expedition called The Gap. The team is mapping and sampling the Romanche Fracture Zone, a deep crack in the Mid-Atlantic Ridge roughly halfway between Brazil and West Africa, at depths down to 4,500 meters, and the dives stream live with scientists narrating on the institute’s YouTube channel through late October. Put it on some evening. There’s a real chance you’ll be among the first people to ever see what drifts past the camera.
Keep exploring: our guide to the most amazing animals on Earth, the strangest defense mechanisms in the animal kingdom, the Greenland shark that lives for centuries, animals hiding in plain sight, and our guide to the natural wonders of the world.
