U.N. Ocean Conference sets sail off France on World Oceans Day

World leaders, scientists, and advocates gather in Nice to confront ocean threats and push for marine protection.

Dozens of research and exploration vessels from around the world set sail just off the French coastal city of Nice on Sunday (June 8, 2025) to kick off the third U.N. Ocean Conference and pay tribute to World Oceans Day.

The event, themed “Ocean Wonders,” saw the vessels sail across Nice’s Baie des Anges, or Bay of Angels, to spotlight the beauty and importance of the ocean while urging world leaders not to lose sight of its value as they make decisions about the planet’s future.

Thousands of delegates, including heads of state, scientists, and environmental advocates, are expected in Nice this week to confront growing threats to the ocean, and the need to transform pledges into protection.

The United Nations has called the threats a global emergency facing the world’s oceans as they confront rising temperatures, plastic pollution choking marine life, and relentless overexploitation of fish and other resources.

Just 2.7% of the global ocean is effectively protected from destructive activities like industrial fishing and deep-sea mining – far below the global goal of 30% by 2030.

Participating boats included the Energy Observer, a solar panel covered catamaran that was the first vessel to circumnavigate the globe using renewable energy alone. It produces hydrogen fuel on board via seawater electrolysis, offering a vision of zero-emissions maritime travel.

Other standout vessels included France’s Alfred Merlin, dedicated to underwater archaeology; the OceanXplorer, a high-tech billionaire-owned research yacht; and the WWF’s Blue Panda, which is working to map and protect the last remaining seagrass meadows in the Mediterranean Sea.