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Marine reserves--sections of the ocean where fishing is prohibited--promote coral reef sustainability by preventing overfishing and increasing fish abundance and diversity. But to be effective, they need to be sized right, and in a way that accounts for how far juvenile fish travel away from their parents after spawning.
Scientists have successfully measured the dispersal distances of two coral reef fish species across a 3,000-square-mile section of the ocean--an area the size of Yellowstone National Park.Image credit: Simon Thorrold, Woods Hole Oceanographic Institution
