By Daniel Lawler

The world’s largest whale graveyard has been discovered at the bottom of the Indian Ocean by Chinese scientists, who found that the vast expanse of both new and ancient carcasses supports huge communities of deep-sea life.

It is also the deepest and oldest known whale graveyard on Earth, according to research published in the journal Nature on Wednesday, with some fossils dating back 5.3 million years.

From inside a small submersible, the Chinese researchers saw an array of strange animals — many believed to be new to science — living off the whale carcasses.

A new, though extinct, species of whale was also identified among the nearly 500 skeletons found up to 7,000 metres deep along a 1,200-kilometre corridor of bones in the Indian Ocean west of Australia.

Lead study author Xiaotong Peng of the Chinese Academy of Sciences told AFP that the researchers were “astonished” when the scale of their discovery became clear.

It was known that when whales die and drop to the seafloor, their sunken bodies — called “whale falls” — provide a source of food to bottom-dwelling creatures.

“But discovering a necropolis of this scale was completely unexpected: the size of distribution, the depth and the age range were far beyond anything we had imagined,” Peng said.

The researchers had several theories for why so many whales died in this particular corridor, including that it is a popular foraging area and has a V-shaped trench that funnels carcasses to the ocean’s floor.

‘Truly incredible experience’

For the discovery, the Fendouzhe submersible carried out 32 dives in 2023 — though what it found was only revealed in Nature on Wednesday.

The sub took up to three people on the dives, collecting the fossil samples using robotic arms.

Study co-author Zhou Peng said witnessing the whale graveyard “was a truly incredible experience”.

“The vibrant ecosystems we saw offered a completely different perspective on this otherwise dark and cold ocean floor.”

Among the animals they discovered living off the carcasses were jellyfish, worms, snails, crustaceans, brittle stars and molluscs called bivalves.

Extrapolating from the number of bones they found, most of which were from beaked whales, the scientists estimated there could be more than 10 million carcasses across the area called the Diamantina Zone.

The soft tissue and lipids inside those many carcasses “translates to roughly 6.7 million tonnes of sequestered carbon,” Xiaotong Peng said.

This provides an immense source of sustenance for animals, similar to how hydrothermal vents create their own ecosystems on the ocean floor.

Some of the animals seen by the scientists also live in hydrothermal vents and cold seeps, suggesting whale carcasses could help connect these deep-sea communities to each other.

While this is by far the largest whale graveyard yet found, fossils found during trawling suggest there could be others off South Africa, the Iberian peninsula and the Crozet islands, according to the study.

‘More blockbusters to come’?

University of Hawaii oceanographer Craig Smith, who discovered the first whale fall in 1987 but was not involved in the new research, told AFP it was “extremely exciting”.

“The vast number of fossil whale falls documented, including a new species of beaked whale, is truly amazing and is of major importance to understanding whale evolution and whale distributions over geologic time,” he said.

Whale fall researcher Amy Baco-Taylor at Florida State University told AFP the “remarkable discovery” would “likely provide many new insights”.

“It does seem very strange” that so many whales died in this area, Baco-Taylor admitted, adding that “we don’t know enough about whale consciousness”.

US palaeontologist Stephen Godfrey compared the “truly unique discovery” to past major underwater finds, such as when scientists first identified hydrothermal vents teeming with life on the ocean floor in 1977.

He called for future submersible voyages to find more whale graveyards across the world.

This discovery “reminded me of a trailer for the first in a series of epic movies”, Godfrey commented in a linked Nature paper.

“I hope that there will be many more of these blockbusters to come.”

Artists Christian Rebecchi and Pablo Togni, who work as NEVERCREW, have a knack for bringing the immensity of nature to developed urban spaces. Their colorful, large-scale murals take a playful tack when it comes to portraying animals, often merging them with other objects such as instant photos or, most recently, a plastic punch-out toy. “Souvenir,” completed this year in Vienna, combines motifs of a large bear with other Arctic components, such as icebergs, a seabird, and a steamship.

“The natural environment appears transformed, filtered, made artificial: it is no longer a space experienced through relationship, but a distant construction,” the artists say in a statement. The work is “almost a simulation reflecting a perception of nature progressively emptied of empathy…Nature becomes something to observe, arrange, organize, as if it were a separate object rather than a system of which we are an integral part.”

Over the past few years, NEVERCREW has completed numerous architectonic paintings that depict the fragile balance between humanity and nature—specifically wildlife. Whales, bears, and elephants are depicted inside of terrariums or bundled into fabrics.

The animals’ very presence on the side of buildings, where they are contained within the bounds of the architecture, is a reminder of the tensions between—one might even say the incongruousness of—daily human activities and city infrastructure. For Rebbechi and Togni, bringing nature into these spaces highlights the importance of sustaining the relationship between humankind and nature.

See more on the artists’ Instagram.

Do stories and artists like this matter to you? Become a Colossal Member today and support independent arts publishing for as little as $7 per month. The article NEVERCREW Explores Our Tenuous Relationship with Nature in Huge Murals appeared first on Colossal.

The ocean floor is covered with dead whales–but it is everything but a biohazard. When a whale dies, its body sinks to the ocean floor in a process called whale fall. The carcass then becomes its own complex ecosystem, nourishing and housing all types of marine life. Whale bones can then fossilize over time, leaving behind traces of what life looked like millions of years ago.

Now, scientists in the Indian Ocean have discovered an enormous whale graveyard. The collection of bones and communities supported by these whale falls stretches 745 miles across the seafloor 13,779 to 22,965 feet deep. The oldest whale fossil is roughly 5.3 million years old and the graveyard even includes a new species of extinct whale. The findings are detailed in a study published today in the journal Nature. 

“The deep sea is far from barren—it’s dynamic, full of life and history,” Dr. Xiaotong Peng, a study co-author and engineer at the Chinese Academy of Sciences (CAS), tells Popular Science. “When a whale dies and sinks, it becomes an oasis, supporting unique communities for decades or centuries.”

In 2023, CAS team was studying the geology and biology of the southeast Indian Ocean’s hadal zone—the ocean’s deepest zone, extending from 19,680 to 36,000 feet-deep. While inside of a submersible, the divers spotted the first whale fossil 22,972 feet below the surface.

According to study co-author and geologist Dr. Peng Zhou, the remains were actually “quite easy to find” once the team began to search. “They looked unusual, so when the dive scientists first encountered them, they wanted to figure out what they were,” Zhou tells Popular Science. 

Peng adds, “We immediately pivoted our objectives to systematically map, document, and sample these whale remains. So it really came down to curiosity meeting the technological capability to explore depths that had been largely inaccessible.”

They documented 485 whale fossil sites from five active whale falls. The whale carcasses are home to a large community of jellyfish, brittle stars, bone-boring worms, and bivalves. Some of these species living in the carcasses may even be new to science, but that has not been confirmed. The oldest have been in the area for about 5.3 million years ago (the Pliocene era).

Most of the whale fossils come from several species of deep-diving beaked whales. Some of the bones belong to beaked whales that still exist today. Others are from extinct whales, including a species new to science named Pterocetus diamantinae.

“Finding both extinct genera like Pterocetus and living species like Mesoplodon bowdoini preserved together in the same region, across 1,200 kilometres [745 miles] of seafloor at such extreme depths—that was truly unexpected,” says Zhou.

This fossil record is also continuous, so the team can track the population dynamics and evolution of deep-diving whales over time. 

“These fossils give us a direct window into the Pliocene, about 5.3 million years ago,” study co-author and biologist Dr. Xikun Song tells Popular Science. “They show that beaked whales were already specialized deep‑divers in the Indian Ocean by that time. Beyond the whales themselves, the associated fossil fauna also tells us about the structure of ancient deep‑sea whale‑fall communities and broader deep‑sea biodiversity back then.”

This whale graveyard could reshape our understanding of both living and extinct beaked-whales. There are roughly 24 species of beaked-whale living today. However, their deep-sea habitat, likely low population numbers, and reclusive behavior make them difficult to study. Having such a large fossil deposit like this could help explain more about their reclusive lives.

The fossils are also shedding more light on the mysterious ecosystems living at the ocean’s deepest depths.

“Discoveries like this are possible because of curiosity, collaboration, and technology,” Peng concludes. “We’ve barely scratched the surface of the deep ocean, and there’s so much more waiting to be found.”

The post 745-mile whale graveyard found at the bottom of Indian Ocean appeared first on Popular Science.