<p>Dock workers use cranes to off-load frozen tuna from a Chinese-owned cargo vessel at the General Santos Fish Port, in the Philippines. Tuna stocks in the South China Sea have plummeted in recent years because of overfishing.</p>

Dock workers use cranes to off-load frozen tuna from a Chinese-owned cargo vessel at the General Santos Fish Port, in the Philippines. Tuna stocks in the South China Sea have plummeted in recent years because of overfishing.

Photograph by Adam Dean, National Geographic

One of the World's Biggest Fisheries Is on the Verge of Collapse

Major disputes in the South China Sea are putting critical habitat—and the food supply of millions—at risk.

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