The Seabed 2030 project, an international effort to create a comprehensive map of the world's ocean floor, has revealed a previously unknown underwater mountain range stretching over 800 kilometers across the Southern Ocean between Antarctica and New Zealand. The ridge, formed by volcanic activity along a tectonic plate boundary, rises up to 3,000 meters from the ocean floor and hosts ecosystems unlike any previously documented.
The discovery was made using multibeam sonar technology deployed from the research vessel Falkor (too), operated by the Schmidt Ocean Institute. The seamount chain, which the team has named the Aurora Ridge, consists of more than 30 individual peaks, several of which rise to within 500 meters of the surface. Initial remotely operated vehicle (ROV) surveys revealed dense communities of deep-sea corals, sponge gardens, and previously unknown species of fish and invertebrates.
Biodiversity Hotspot
"We expected to find geological features, but the biological richness is extraordinary," said chief scientist Dr. Kerry Howell of Plymouth University. "The Aurora Ridge appears to function as a biodiversity corridor, connecting ecosystems across the Southern Ocean. Several of the species we've observed appear to be new to science."
The discovery underscores how much of Earth's ocean floor remains unexplored. Despite covering 71 percent of the planet's surface, only 25 percent of the ocean floor has been mapped to modern standards. The Seabed 2030 project, launched by the Nippon Foundation and the General Bathymetric Chart of the Oceans, aims to complete a comprehensive map by the end of the decade.
The finding has immediate implications for ocean governance. Environmental organizations are calling for the Aurora Ridge to be designated as a marine protected area under the recently adopted High Seas Treaty, which provides a framework for protecting biodiversity in international waters. Scientists warn that without protection, the seamount ecosystems could be vulnerable to deep-sea mining interests and bottom trawling by fishing fleets that are expanding into Southern Ocean waters.
