Scientists logged 1,121 new ocean species, including a ghostly deep-sea shark

A global effort to catalog the animals living in the least-explored reaches of the sea has produced a milestone number, adding more than a thousand creatures to the scientific record in a single stretch of expeditions. Among the standouts is a pale, wing-finned relative of sharks that glides through the deep like an apparition.

A record haul of 1,121 species

The Ocean Census, a large international alliance built to speed up the discovery of marine life, reported that its researchers had identified 1,121 species new to science across a run of expeditions. The figure marked a sharp jump over the previous stretch of work, reflecting a coordinated push to shorten the years-long lag that usually separates a specimen’s collection from its formal description.

The tally was drawn from 13 expeditions carried out between April 2025 and March 2026, reaching down to depths of roughly 6,575 meters in some of the most remote waters on the planet. More than 1,400 taxonomists and scientists from hundreds of institutions across dozens of countries contributed to the identifications.

That scale of collaboration is central to how the figure was reached. Rather than relying on a handful of specialists working in isolation, the effort pooled expertise across many fields and regions, so that a specimen pulled from a trench in one part of the world could be matched quickly against the knowledge of experts elsewhere. The result is a count that reflects coordinated labor as much as raw exploration.

The ghost shark that headlined the find

The creature that captured the most attention was a chimaera, a group commonly nicknamed ghost sharks for their smooth, spectral appearance and drifting movement. Chimaeras are distant cousins of sharks and rays, sharing the cartilaginous skeleton of that broader lineage while occupying a branch of their own that split off hundreds of millions of years ago.

The new species was documented during an expedition to the Coral Sea Marine Park off the Queensland coast, where a taxonomist specializing in sharks and their relatives recognized it as distinct. A detailed rundown of the ghost shark and other headline animals appears in the survey of new marine species discovered during the census.

Life inside a glass castle

Not every discovery was a swimmer. One of the more striking finds was a marine worm that makes its home inside the crystalline lattice of a glass sponge, an animal whose skeleton is built from silica rather than the calcium carbonate that hardens most reef-builders. The worm was recovered from a volcanic seamount during a deep-sea expedition, tucked into the intricate chambers of its host.

Discoveries like that one underscore how much of the ocean’s diversity is hidden not just by depth but by scale, living in partnership with other organisms in habitats that are difficult to sample without submersibles and remotely operated vehicles.

Why the count jumped so sharply

Under normal circumstances, describing a new marine animal can take well over a decade, as specimens wait in queues for expert attention. The census was built specifically to compress that timeline by connecting field expeditions directly to networks of taxonomists and by standardizing the way new specimens are handled, imaged, and shared.

The organizers reported that the number of species identified rose by more than half compared with the prior period, a jump they attributed to that streamlined pipeline rather than to any single, unusually productive dive. A summary of the alliance’s methods and headline results was published through the project’s own landmark census announcement.

What a thousand new names actually means

Each formal description adds a verified entry to the global inventory of life, complete with a scientific name, a physical account, and, increasingly, genetic data. That inventory matters because conservation decisions, fishery rules, and habitat protections all depend on knowing what actually lives in a given stretch of ocean.

Scientists involved in the work have stressed that the 1,121 figure represents only a fraction of what remains undocumented in the deep sea, where each expedition tends to return with organisms that no one has ever formally recorded. The pace of discovery, in other words, says as much about how little is known as it does about how much has been found.

A snapshot of an unfinished map

The broader significance of the count lies in how it reframes the ocean as a place still being charted. Vast portions of the seafloor have never been surveyed at the resolution needed to spot small or camouflaged animals, and each descent into a trench, seamount, or cold-water cave tends to widen the gap between what is cataloged and what is suspected to exist.

There are practical stakes in closing that gap. Deep-sea habitats are increasingly eyed for activities such as mining and expanded fishing, and decisions about whether and how to exploit them depend on knowing what lives there. A species that has never been described cannot factor into an environmental assessment, which means the pace of cataloging is not merely academic but directly tied to how well fragile ecosystems can be weighed against commercial pressure.

By treating discovery as an organized, repeatable effort rather than a series of isolated expeditions, the census has turned a slow trickle of new names into a steady stream. The ghost shark and its thousand-plus companions are, in that sense, less an endpoint than a marker of how much deep-sea territory remains to be named.

This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.

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