Ocean Census – A deep-sea survey announced 1,121 previously unknown marine species since last April, including a mysterious worm living inside a glass sea sponge and new deepwater creatures off Japan, Australia, and Antarctica—while scientists warn that not all of the discov
When the submersible crew brought back images from deep, cold waters off Japan, one small creature stood out—not because it was pretty, but because it looked engineered for mystery.
Dalhousiella yabukii. a polychaete marine worm. lives inside a glass sea sponge. a simple marine animal that forms a glass-like skeleton. The new footage is part of a much bigger haul: the Ocean Census announced that it has found 1. 121 previously unknown ocean species since last April. The project. which aims to accelerate the discovery of sea life. is a joint mission of the UK-based nonprofit Nekton and Japan’s largest philanthropic organization. The Nippon Foundation.
Oliver Steeds, director of the Ocean Census and founder and chief executive of Nekton, described what this adds up to in a single year. He said the number marks a massive jump in newly discovered marine species in that period.
The sweep has surfaced an assortment of marine life, from fish and rays to sponges and soft corals. Some of the creatures are vividly strange—like a ribbon worm found near Timor-Leste in Southeast Asia. In a press release announcing the new findings. scientists described the worm’s bright colors as potentially a signal to predators that it produces defensive toxins. The chemicals matter beyond the ocean theater: scientists previously investigated substances from similar worms to treat cognitive disorders. including Alzheimer’s disease.
The Ocean Census also uncovered larger animals—creatures that may have avoided detection simply because they live at great depths in less-explored regions.
Off the coast of Australia. scientists found a new species of “ghost shark.” Though it has a name that sounds like a familiar predator. it is not actually a shark. It is a chimaera. a deep-sea fish distantly related to sharks and rays. with a skeleton made of cartilage instead of bone. In the same region, scientists found an unknown species of ray within Australia’s Coral Sea Marine Park.
Other discoveries included an unfamiliar example of what’s known as a catshark. These are bottom-dwellers with slender bodies, and some have a feline appearance. The specimen pictured in the coverage was found deep underwater in Australia. A catshark in the genus Apristurus was also identified as having been found in Australian waters.
Then there were the animals that don’t immediately look like animals at all.
In the South Atlantic. not far from Antarctica. researchers found an unfamiliar sea sponge belonging to a group called ping-pong ball sponges—so named because of the ball-like structures. The animal is carnivorous. It uses those balls, covered in tiny Velcro-like hooks, to entrap prey drifting by, including small crustaceans.
Also in the South Atlantic, the Ocean Census reported an unknown variety of “sea pen,” a soft coral found more than 2,600 feet below the surface. A sea pen isn’t a single animal in the usual sense: it’s a colony of thousands of genetically identical polyps, each soft-bodied with tentacles.
What makes the announcement feel so urgent is not just the novelty of these creatures, but the language used to describe them.
The Ocean Census said it “discovered” more than 1,100 “new” species in a single year. But scientists emphasized that the word “new” requires caution. Proving a species is truly new to science can be difficult. Taxonomists typically have to compare the animal against existing museum collections and academic literature. demonstrating—through anatomical traits. genetic data. or other features—that it hasn’t been documented before. Only then do researchers submit evidence for peer review and publication. a process that formally describes the species and gives it an officially recognized name.
Greg Rouse. a marine taxonomist at the Scripps Institution of Oceanography. said that many of the Ocean Census discoveries have not yet undergone that full level of due diligence and have not been formally described. That means it’s not clear all of them are, in fact, new to science. The Ocean Census itself acknowledged the timeline problem: the time between collecting a species and formally describing it as new takes about 13 years on average. and its group said some animals could go extinct before they’re even described in the scientific literature.
Rouse said. “But that 13 years is there for a reason.” In his view. formal description isn’t just a scientific paperwork step—it’s what confirms novelty. Once a species is formally described and named. it becomes easier to study and conserve. including through laws that protect named endangered species.
Tammy Horton. a research scientist at the UK’s National Oceanography Centre. described the practical stakes with a direct emphasis on the record-keeping that follows scientific verification. “The formal description process carries out the actual work to confirm novelty and provides the ‘passport’ for that new species — its official record. ” Horton said. “Without this. the formally recognised name. the species effectively does not exist for science. and therefore also for policy — unnamed species cannot be protected.”.
Skepticism also came from other researchers outside the project. Karen Osborn. a taxonomist at the Smithsonian National Museum of Natural History. said discovery alone isn’t enough to equate to formal description. “I don’t feel like saying. ‘Oh. look. we discovered something new’ should be given the status of something being described — until you’ve actually done the work to show that it’s something unique. ” Osborn said. Still, she added, “it’s a step in the right direction.”.
Steeds offered a different framing, insisting the Ocean Census is built around the first part of the pipeline. He told the reporter he didn’t know how many of the announced species were already described in the scientific literature. “It is not for us to do that,” he said about formally describing the species. “Our job is discovery and to accelerate discovery. ” Steeds said. describing discovery as the first step toward formal new species description.
Horton made the same distinction. “It is important to recognise that the identification or ‘discovery’ process is a fundamental part of the pipeline towards the ultimate goal of description of a species as new to science,” she told the reporter. “You cannot have one without the other.”
The cautious reality is that species discovery and species description are still, in practice, hypotheses. Steeds said, “Species discovery, species description are always a hypothesis — that’s the nature of it. And things do change.” Horton indicated she suspects it’s not very common for taxonomists to later find that a supposed new species was actually an already described individual.
Even with that uncertainty, the findings land with clarity in one area: the ocean remains vast enough to make discovery itself feel like a moving target.
“This is really a planetary blindspot,” Steeds said. Osborn, reflecting on what the public rarely sees, said the point is scale—the sheer amount still out of reach. “I would love people to know how much we don’t know about how much is out there,” she said. “We’ve barely scratched the surface on understanding our world.”.
Ocean Census Nekton The Nippon Foundation marine biology deep sea species polychaete worm Dalhousiella yabukii glass sea sponge ghost shark chimaera sea pen ping-pong ball sponge species description