13 sharks near Rio de Janeiro tested positive for cocaine in a study by the Oswaldo Cruz Foundation.
13 sharks off the coast of Brazil tested positive for cocaine, according to a recent study by the Oswaldo Cruz Foundation. The Brazilian sharpnose sharks, caught from waters near Rio de Janeiro, all had high levels of the drug in their muscles and livers. The study suggests that the drug entered the sharks' system through either drainage from illicit drug labs or untreated sewage from drug users. The exact source of the cocaine remains unclear, and scientists are further investigating if it affects the sharks' behavior, potentially making them more aggressive and unpredictable.
July 22, 2024
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