Shark populations are plummeting, and since these predatory fish mature slowly and reproduce infrequently, their dwindling numbers aren't likely to rebound quickly, if at all. After a decade of collecting and compiling data, Canadian marine ecologist Boris -^ Worm expresses concern N^ for these keystone species: "I feel that sharks are the most endangered marine wildlife we have right now." This map pinpoints how far shark populations around the globe have fallen.
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