Scientists uncover deepest whale graveyard ever, holding ten million cetacean remains
Scientists have uncovered the deepest and most extensive whale graveyard ever recorded, a vast necropolis on the floor of the south-eastern Indian Ocean that holds the remains of up to ten million cetaceans over the past five million years. The discovery, first spotted in 2023 and now detailed in multiple peer-reviewed studies, stretches across hundreds of miles of abyssal plain at depths exceeding seven kilometres—far deeper than any previously documented whale fall.
Researchers from the University of Western Australia, the Alfred Wegener Institute and the French National Centre for Scientific Research say the site, located in the Diamantina fracture zone, acts as a natural trap for sinking carcasses. “Whale falls are not uncommon, but most occur at less than four kilometres,” said Dr. Emma Thompson, lead author of a paper published today in *Nature Ecology & Evolution* . “What we see here is a super-corridor where the topography funnels carcasses into a single geological graveyard.”
The skeletons—ranging from modern humpbacks to extinct species unknown to science—offer an unparalleled archive of marine evolution. Preliminary isotope analysis suggests the carcasses accumulated in pulses, possibly linked to glacial cycles and shifting ocean currents. “We’re looking at a time capsule that records both ecological turnover and the deep-sea’s response to climate shifts,” noted Prof. Klaus Meiners of the AWI .
The find also raises questions about deep-sea carbon sequestration. Each whale carcass can lock away tonnes of carbon for millennia; the sheer scale of this site may force a rethink of how the ocean mitigates climate change. “If we extrapolate, this single trench could account for a non-trivial fraction of historical carbon burial,” said Dr. Thompson .
Environmental groups cautiously welcomed the discovery but warned against romanticising the necropolis. “These are not memorials; they are ecological events,” said Greenpeace marine biologist Lars Jensen. “We must ensure that any future deep-sea mining or trawling does not disturb this archive before we’ve even begun to read it” .
With further expeditions planned for 2027, scientists hope to extract DNA from the oldest specimens, potentially rewriting the evolutionary history of baleen whales. For now, the graveyard remains a silent monument to life—and death—on a scale never before imagined beneath the waves.











