Kategorie: News
Millions-of-years-old whale bones and living deep-sea ecosystems in the Diamantina Zone offer insights into evolution
An international research team led by Xiaotong Peng (Chinese Academy of Sciences) has discovered a previously unknown, gigantic accumulation of whale carcasses and fossils in the southeastern Indian Ocean.
The “whale necropolis” stretches approximately 1,200 kilometers along the seafloor of the Diamantina Fracture Zone and extends to depths ranging from about 4,600 to over 7,000 meters. The Diamantina Fracture Zone is a step-like structure up to 7,100 meters deep in the Southeast Indian Basin of the Indian Ocean.
This discovery represents the deepest and, to date, most extensive known accumulation of fossils. The findings were published in the journal Nature. During 32 dives with the manned submersible Fendouzhe, the researchers documented hundreds of sites: actively colonized whale carcasses alongside numerous fossilized remains (several hundred sites were documented in total).
Flourishing Life – More Than Just Dead Bones
Using strontium isotope analyses, the scientists dated some of the fossils to as far back as approximately 5.3 million years—meaning they date back to the early Pliocene. Thus, the site offers an extraordinary temporal depth that opens up new insights into the evolution and distribution of deep-diving whales.
More than just dead bones: life flourishes on the carcasses. In several locations, the scientists found active “whale-fall” communities—ecosystems that develop around a carcass and feed on the decaying organs and bones. Typical inhabitants include brittle stars, bone-eating worms, and chemosynthetic mussels; the research suggests that these communities also harbor species previously unknown to science. The inaccessibility of such habitats has made researching them so difficult until now—the new discovery now expands the known limits of how deep such specialized communities can be active.
Paleontological finds and new species: Among the recovered remains were primarily skulls and robust rostrums of beaked whales (Ziphiidae). The researchers identified both species still living today and extinct forms; for some fossils, experts even described a new beaked whale species with the scientific name Pterocetus diamantinae. The resulting anatomical and age-related data provide a direct archive for reconstructing the evolution and lifestyle of deep-diving whales.
The authors of the study attribute the presence of so many whale carcasses in this specific location to a combination of factors: the complex topography of the Diamantina Zone (steep slopes and depressions) can concentrate sinking carcasses, the availability of food attracts deep-diving species, and extremely low sedimentation rates favor the long-term preservation of bones. Together, this has apparently led to an unusually dense accumulation over geological time scales.
Significance for research
Experts not involved in the study described the find as “extraordinary”—not only because of its scale, but also because of its significance for questions of phylogeny, distribution, and ecology among cetaceans.
The site also serves as a reminder of how little we know about the deep sea and what biological treasures lie hidden there. Scientific insights into the distribution of chemosynthetic communities, into fossil archives, and into the population dynamics of whales are of great value for conservation and for our fundamental understanding of marine biodiversity.
Protection of the Deep Sea
The discovery comes at a time when interest in the deep sea as a source of raw materials and in new potential uses is growing. Numerous studies and conservation institutions warn that interventions such as deep-sea mining or large-scale trawling can destroy sensitive, barely regenerative habitats. The newly discovered Diamantina necropolis underscores the urgency of examining protection strategies for particularly sensitive deep-sea habitats and addressing the need for research before irreversible interventions take place.
Outlook
The researchers emphasize that comparable, as yet undiscovered “whale archives” may exist in other deep-sea regions—fossil finds from other basins already provide evidence of this. Future expeditions will reveal how widespread such corridors are, what hidden species they harbor, and how these communities may have been connected over geological time. For conservation and research, the rule is: the better we understand these areas, the more effectively we can ensure their long-term preservation.
Sources
- Peng, X. et al., “A 5.3-million-year-old deep-sea whale necropolis in the Diamantina Zone,” Nature, June 10, 2026. https://www.nature.com/articles/s41586-026-10546-z
- National Geographic, “Scientists discover ‘graveyard’ of whale skeletons in an ocean abyss off Australia,” June 10, 2026. https://www.nationalgeographic.com/(..)graveyard-deep-sea-bones-fossils
- Chinese Academy of Sciences (Press Release), “5.3-million-year-old Whale Graveyard Hotspot Found in Indian Ocean,” June 11, 2026. https://english.cas.cn/newsroom/(..)1161688.shtml
- The Guardian, “Deepest and most extensive whale graveyard discovered in Indian Ocean,” June 10, 2026. https://www.theguardian.com/(..)whale-graveyard-discovered-indian-ocean
- IUCN / Reports on deep-sea risks (deep-sea mining) and scientific reviews of the ecological consequences of deep-sea interventions. https://iucn.org/sites/(..)iucn-issues-brief_dsm_update_final.pdf
YouTube Video https://www.youtube.com/watch?v=ox28X9Xq5vk