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49 dolphins mysteriously wash ashore dead on beach

Guinea dolphins in the waters off Brazil
Guinea dolphins in the waters off Brazil (Associated Press)

PUERTO MEDRYN, Argentina – Authorities in northern Argentina are trying to solve a mystery after dozens of dead dolphins reportedly washed ashore on a resort beach.

Of the many short-beaked dolphins stranded on the beach in Puerto Medryn, 49 died, while 12 were able to return to sea, according to the Express.

A couple who noticed a high amount of birds on the beach discovered the dolphins and alerted officials.

Argentina's Secretary of Protected Areas says a large killer whale presence in the area may have driven the dolphins closer to shore.

Just nine years ago, 26 dolphins were found dead on another Argentinian beach.