Hat-Wearing Crab Leads 149 New Species Discovery

Two expeditions aboard the RV Investigator in 2021 and 2022 have revealed approximately 149 previously unknown animal species dwelling in the Indian Ocean's depths. These discoveries occurred across 22 seamounts near the remote Keeling Islands, a region approximately 1,300 miles northwest of Australia.

The collected specimens, numbering over 1,000, have been distributed to Australian museums for expert examination. Notable among the newly identified life forms is a unique sponge crab that uses marine invertebrates as a living hat, alongside a robust sea star named Atheraster umbo and a transparent worm, Laetmonice murrayae.

Some of these creatures inhabit depths exceeding 16,000 feet, including an annelid worm that represents one of the deepest-dwelling animals ever found by the Investigator. Scientists noted the surprising resilience of hard-bodied animals at such extreme depths and observed that the biodiversity across the seamounts suggests interconnected habitats, acting as 'stepping stones' for marine organisms.

Findings from these voyages will significantly aid in managing Australia's remote marine parks and understanding human impact on these fragile ecosystems. Researchers emphasize the critical need for continued deep-sea exploration to gather baseline knowledge essential for effective ocean conservation and management on a global scale.