Hundreds of dead dolphins splashed up on northern Peru's Pacific Ocean beaches in January, confounding scientists and marine biologists.
In all, officials say more than 400 of the mammals have washed ashore in a region where more than twice that amount were found in 2012, The Associated Press (AP) reports.
Authorities have so far been unable to figure out why the dolphins were dying in 2012 but are currently in the process of performing autopsies on the latest dolphins to wash ashore last month, in the Lambayeque region of Peru's north coast.
As reported by AP:
Technician Jaime de la Cruz of Peru's IMARPE marine life agency said about 220 dead dolphins were found in the last week of January, the rest during the previous three weeks.
De la Cruz said autopsy results are expected [soon]. Exams will focus on lungs, kidneys and livers.
Officials and experts are stumped
Autopsies performed on more than 870 dolphins discovered in 2012 were not conclusive, Peruvian
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