Clipperton Island is a remote, near-atoll in the Pacific with a dark, isolated history.

Nature · Published 29 September 2026 Swipe more like this →

In short: This uninhabited French territory, located over 1,000 kilometers from the Mexican coast, is a geological anomaly. Once the site of a brutal, self-proclaimed kingdom during the Mexican Revolution, the island now serves as a unique laboratory for climate scientists and a sanctuary for endemic marine life and migratory birds.

Clipperton Island, or La Passion–Clipperton, is an 8.9 square kilometer coral atoll in the eastern Pacific. Though often associated with Oceania due to its marine fauna, it sits 1,280 kilometers from Acapulco. It is not a true atoll but a 'near-atoll' because it features Clipperton Rock, a 29-meter volcanic remnant. The island encloses a stagnant, meromictic lagoon that has been cut off from the ocean for approximately 170 years, creating a stratified environment with a toxic, hydrogen sulfide-rich deep layer.

The island's human history is marked by conflict and isolation. After being charted by French explorers in 1711, it became the subject of a bitter sovereignty dispute between France and Mexico. In 1905, Mexico established a military colony, but during the Mexican Revolution, the outpost was abandoned to its fate. Lighthouse keeper Victoriano Álvarez seized control as a brutal 'king' until the final eleven survivors were rescued in 1917. An international arbitration led by King Victor Emmanuel III of Italy eventually awarded the territory to France in 1931.

Today, Clipperton is a state private property of France, though it remains largely uninhabited. Scientific expeditions, such as the 2005 mission by Jean-Louis Étienne, have cataloged its unique biodiversity, including endemic species like the Clipperton angelfish and the bright-orange Clipperton crab. However, the island faces modern threats: invasive ship rats have decimated native crab and bird populations, and its beaches frequently collect plastic waste and occasional illicit contraband, such as cocaine. Despite its isolation, the surrounding 370-kilometer exclusive economic zone remains a point of strategic interest for France.

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