White shark census

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White sharks off the central California coast are far fewer in number than researchers expected, according to the first-ever scientific census. But what that says about the health of the population is not clear.

Perched atop the tip of the food chain, big, fierce predators are rare. Now it seems that white sharks may be the rarest of the rare among ocean predators, according to the first-ever scientific census of their numbers along the central California coast, by a group that included Stanford researchers.

The researchers estimate that there are only about 219 adult and sub-adult white sharks