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Thresher Shark in Net, Mexico

Photo: This thresher shark was caught in a net in Mexico's Gulf of California
Doomed by a gill net, a thresher shark in Mexico's Gulf of California is among an estimated 40 million sharks killed yearly for their fins. They add to the devastating global fish catch: nearly 100 million tons.
Photograph by Brian Skerry

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Lesson Plan: Using Ocean Maps

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