Ancient 'whale graveyard' in Indian Ocean teeming with life

An extraordinary discovery in the southeastern Indian Ocean has revealed a vast 'graveyard' of whale carcasses teeming with life, dating back millions of years. Scientists have identified communities of jellyfish, tube worms, and brittle stars flourishing on these ancient remains, found at depths of up to 7 kilometers (23,000 feet).

This site represents the largest, deepest, and oldest 'whale fall' ecosystem ever found. These unique underwater settlements form when whale carcasses descend to the ocean floor, providing a rich food source for surrounding organisms. The sheer size of whales and the unique chemistry of their bones are crucial for creating these environments, according to Ksikun Song, a biologist at the Chinese Academy of Sciences' Institute of Deep Sea Science and Engineering.

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At the same time, the very nature of the deep ocean makes these places extremely difficult for scientists to locate.

Locating these deep-sea sites presents significant challenges for researchers. During deep-sea submersible expeditions in 2023, scientists mapped the extent of this necropolis, finding five locations with carcasses and fossils, including remains of beaked and baleen whales. The oldest bones discovered are approximately 5.3 million years old.

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The potential number of samples is truly astounding.

The whale falls support a diverse array of life, from sea cucumbers and squat lobsters to saltwater clams. Many of these species are likely new to science, according to findings published in the journal Nature. Paleontologist Steven Godfrey of the Calvert Marine Museum described the potential number of samples as "truly astounding."

Researchers believe several factors contributed to the long-term preservation of the bones, including their density, which resists bone-eating worms, and their deep location, which protects them from sediment. A thin mineral layer from the surrounding seawater may have also prevented decay. The study of these whale graveyards is vital for understanding how life adapts to extreme conditions, such as lack of light, low oxygen, and immense pressure, as noted by study co-author and paleontologist Giovanni Bianucci.

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It is important for understanding how life can adapt to such extreme conditions, not only due to the lack of light and oxygen, but also due to the incredibly high pressure.