World’s largest whale graveyard discovered off Australian coast

Scientists have uncovered what is believed to be the world’s largest whale graveyard off the coast of Australia, with carcasses dating back millions of years, according to a new study published in the journal Nature. The vast whale necropolis was found in the Diamantina Zone, stretching approximately 1,200 kilometers (745 miles) across the seafloor of the southeastern Indian Ocean, at depths ranging from 4,616 to 7,001 meters (15,000 to 23,000 feet). Researchers identified an extensive accumulation of whale remains, including five modern whale-fall communities—deep-sea ecosystems that form around whale carcasses—and 476 fossil cetaceans.

Scientific significance

The fossil record includes both extant and extinct deep-diving beaked whales. Using atomic isotope dating, researchers determined that the carcasses date back as far as 5.3 million years ago. The study of the zone offers insights into the origins, paleoecology, and population dynamics of beaked whales from the Pliocene era to the present day. The discovery is significant because whale falls are rare and provide unique habitats for deep-sea organisms, including bone-eating worms and specialized mollusks.