While there certainly are open-ocean predators, most shark threats are in the shallows and near food sources.

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Dr Julia Baum, a marine ecologist at the Scripps Institution of Oceanography, US, and a member of the World Conservation Union (IUCN), said excessive fishing was putting many of the ocean's "most majestic predators" at risk of extinction.

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Although we live in an ever larger global village and international investing is growing, that does not mean that there are fewer predators in an ever larger ocean.

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