Fishing imperils 40 shark species in the Galapagos

Just how many sharks are being killed here is unclear, experts say, because so many are caught illegally. But according to one study, about a half-million sharks were annually killed in Ecuadoran waters from 1979 to 2004. In the Galapagos, recent research indicates overfishing is causing shark numbers to crash, causing a ripple among marine animals.  

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