Deepest and Oldest Whale Graveyard Discovered in Indian Ocean

Researchers have discovered marine life flourishing on ancient whale carcasses deep in the southeastern Indian Ocean. These carcasses create unique ecosystems, providing sustenance for marine species like jellyfish, tubeworms, and brittle stars.

This whale graveyard, located at depths up to 23,000 feet, is the largest, deepest, and oldest known. The remains span several areas, and some bones date back 5.3 million years. Biologist Xikun Song from the Institute of Deep-sea Science and Engineering explains that a whale’s size and bone chemistry contribute to these ecosystem formations. However, the deep ocean’s nature makes such discoveries rare and challenging.

In 2023, researchers conducted multiple deep-sea submersible missions to explore the necropolis. They mapped the area and took samples, finding five sites of carcasses, including fossilized skulls from beaked and baleen whales.

The carcasses support various marine life forms, including sea cucumbers, squat lobsters, and saltwater clams. Many could be undocumented species, as stated in the journal Nature.

Paleontologist Stephen Godfrey from the Calvert Marine Museum notes the massive potential diversity of specimens in these environments.

The study authors suggest several factors help preserve whale bones for millions of years. Bones are dense enough to resist bone-eating worms. Their depth in the ocean prevents burial by sediments. A mineral coating from seawater helps prevent degradation.

The reasons for so many whale deaths in this area remain uncertain. Whales may have lived there and died naturally, succumbed to diving-related exhaustion or illness, or washed into the area shaped like a V, channeling remains to their resting site.

These discoveries provide insights into how marine communities adapt and thrive in extreme conditions, despite limited light and oxygen, and immense pressure.

Study co-author Giovanni Bianucci, a paleontologist at the University of Pisa, emphasizes the importance of understanding life adaptations in these harsh environments.