French Polynesia Creates a Marine Sanctuary the Size of France

On June 9, 2026, French Polynesia gave one of the largest gifts to the ocean in recent memory. The Pacific territory announced that 520,000 square kilometers of sea — an expanse roughly the size of France — would receive the highest level of protection, with mining, bottom trawling and industrial fishing all banned. The newly safeguarded waters wrap around the remote Austral and Marquesas archipelagos, home to coral reefs, seamounts and migration corridors for whales, sharks and seabirds.

The designation carries the IUCN’s strictest conservation status, meaning these waters are set aside for nature rather than extraction. For the small island communities of French Polynesia, whose culture and livelihoods are woven into the sea, the decision is both an act of stewardship and a statement about who the ocean is really for. President Moetai Brotherson presented the measure as part of the territory’s ambition to protect its vast maritime domain while keeping traditional, small-scale fishing alive for its own people.

“The Pacific territory announced that 520,000 square kilometers of sea — an expanse roughly the size of France — would receive the highest level of protection, with mining, bottom trawling and industrial fishing all banned.”

Conservationists greeted the announcement as a landmark. “This cements French Polynesia’s place as the global leader in marine conservation,” said Maël Imirizaldu of the Blue Nature Alliance, who added a reflection that captures why such places matter: “The ocean is what sustains us, connects us, makes us resilient.” The protected zone shelters ecosystems that are still remarkably intact — the kind of healthy, biodiverse waters that have become rare across much of the planet.

Highly protected areas like this one do more than draw lines on a map. Decades of evidence show that when fishing pressure is lifted, fish grow larger and more numerous, and the surplus spills over into surrounding waters where communities can sustainably harvest it. Reefs recover, predators return, and the whole system becomes more resilient to warming seas. French Polynesia’s pledge adds a France-sized piece to the global effort to protect 30% of the ocean by 2030 — a reminder that some of the most powerful climate and biodiversity action is simply the decision to leave a wild place wild.