Whale Graveyard Hosts Thriving Marine Ecosystems

Scientists have discovered thriving marine life communities on an ancient whale graveyard located deep in the southeastern Indian Ocean. This site, featuring jellyfish, tubeworms, and brittle stars, marks the largest area and the deepest and oldest whale graveyard found to date.

Whale carcasses fall to the sea floor and become crucial food sources for surrounding marine creatures. Xikun Song, a biologist at the Chinese Academy of Sciences, explains that the size of whales and the unique chemical makeup of their bones foster these underwater ecosystems. Identifying such sites is challenging due to their location in the deep ocean.

The remains were explored through several submersible expeditions in 2023. Researchers collected samples and mapped the necropolis, discovering five carcass sites along with fossils, including beaked and baleen whale skulls. Some of the oldest bones are estimated to be about 5.3 million years old.

The carcasses hosted diverse creatures, such as sea cucumbers, squat lobsters, and saltwater clams. Many may be undocumented species, according to findings published in Nature. Paleontologist Stephen Godfrey from the Calvert Marine Museum commented on the vast number of potential specimens found.

Study authors suggest multiple factors contributed to bone preservation over millions of years. Dense bones resisted bone-eating worms’ attacks, and the depth prevented them from being buried by sediments. Additionally, mineral coatings from seawater may have protected the bones.

Possible explanations for the prevalence of whale carcasses in this region include natural deaths of whales already inhabiting the area, exhaustion, or illness from deep-sea diving. The V-shaped area may have guided the remains to their resting place.

These findings offer valuable insights into adaptive life forms in extreme environments. Studying whale graveyards helps scientists understand how marine life can survive in conditions with limited light and oxygen and immense pressure, according to paleontologist Giovanni Bianucci from the University of Pisa.

The Associated Press Health and Science Department has received support from the Howard Hughes Medical Institute’s Department of Science Education and the Robert Wood Johnson Foundation, with AP maintaining sole content responsibility.