Only 3.5 percent of the world's oceans are currently under complete protection. On June 8, 2026, President Moetai Brotherson significantly enlarged this share with a single decision: 1.4 million square kilometers of ocean around French Polynesia's islands received the highest protection status, with industrial fishing and deep-sea mining now banned. That's more than two-and-a-half times the land area of France and surpasses every previously existing fully protected marine area in the world.
Protection in Three Steps
French Polynesia controls one of the world's largest Exclusive Economic Zones: roughly five million square kilometers in the South Pacific surrounding 118 islands. In June 2025, President Brotherson announced at the UN Ocean Conference in Nice that he would designate the entire economic zone as a marine protected area with different protection levels based on proximity to shore and prior use. A year later came the decisive step: 520,000 square kilometers around the Austral Islands and the Marquesas received the highest protection status. Combined with already fully protected waters around the Society Islands and the Gambier Islands, 30 percent of all Polynesian waters now have the strictest protection category.
The Austral and Marquesas Islands previously sat in lower protection categories despite being among the ecologically most significant marine areas in the entire Pacific. Conservation International identifies them as critical spawning grounds for large tuna and vital habitats for endangered shark species, humpback whales, and sea turtles.
What the Protection Means and Allows
The highest protection status prohibits all extractive uses: industrial fishing, bottom trawling, deep-sea mining, and oil drilling are no longer permitted in these waters. Only traditional fishing is allowed in designated coastal zones, on vessels under twelve meters in length, and exclusively with hand-lines from the side. France has also maintained a moratorium on deep-sea mining in its waters since 2022, which the Paris government reaffirmed in 2025.
In the newly protected waters, at least 20 shark species live according to Conservation International, including the scalloped hammerhead (Sphyrna lewini) and the oceanic whitetip (Carcharhinus longimanus), both listed as endangered by the IUCN. Also present are humpback whales, pygmy sperm whales, sea turtles, and endemic bird and fish species found only in French Polynesian waters. The ICRI Forum identifies over 1,000 known fish species in Polynesian waters.
In Comparison with Other Marine Protected Areas
The protected area around the Chagos Archipelago in the Indian Ocean was long considered the benchmark: 640,000 square kilometers, designated by the United Kingdom in 2010. Polynesia's fully protected zone is now more than twice as large. The Ross Sea marine protected area in Antarctica, agreed by 24 states in 2016, encompasses 1.55 million square kilometers total, with roughly 1.12 million under absolute protection without any fishing allowances. Australia's Great Barrier Reef Marine Park covers 344,000 square kilometers but permits commercial tourism and certain fishing forms. A zone with 1.4 million square kilometers under complete protection without exceptions for industrial use has not existed at this scale before.
For the UN goal to protect at least 30 percent of the world's oceans by 2030, the distinction between formally designated protected areas and genuine protection is decisive. The Marine Protection Atlas currently lists 9.8 percent of all marine habitats as officially protected, but only 3.5 percent as fully or strongly protected. The UN High Seas Protection Agreement entered force on January 17, 2026, creating the first legal framework for protected areas beyond national waters. Polynesia's contribution is substantial by these measures.
Three Open Questions About Implementation
Monitoring five million square kilometers of ocean is practically only possible with satellite technology and international cooperation agreements. French Polynesia has some patrol vessels, but they are insufficient to consistently enforce compliance in the most remote parts of the protected area. OceanMind, a nonprofit organization operating satellite-based fisheries monitoring, has already supported Polynesian authorities in building surveillance capacity. However, permanently secured funding for area control remains pending. International protection agreements without adequate enforcement capacity risk remaining on paper while illegal fishing occurs undetected.
Second question: climate change. Protected areas can exclude fishing and mining, but not ocean warming. Coral reefs in French Polynesia have experienced several severe bleaching events since 2016. A protected area increases ecosystem resilience but does not remove it from the global climate context.
Third question: political continuity. Brotherson has governed since 2023, and his party Tavini Huiraatira seeks greater autonomy from France. Whether successor governments will fully maintain commitments remains open. The Tainui Atea protection agreement has public support, and anchoring in national law strengthens durability. Nevertheless, long-term protection effectiveness emerges not from announcement but from consistent implementation across political cycles.