“Cocaine sharks”: Predators off coast of Brazil test positive for drug, scientists say

Marine biologists have discovered cocaine in sharpnose sharks off the coast of Rio de Janeiro, marking the first instance of the drug being found in free-ranging predators.

Thirteen sharks were tested, revealing high levels of cocaine and benzoylecgonine, with female sharks showing higher concentrations in their muscles than males.

The study, dubbed “Cocaine Shark,” suggests a potential link between a shark’s size and its ability to metabolize cocaine, though further research is needed.

Experts propose several theories on how cocaine enters the water, including illegal drug labs, excrement from drug users, or cocaine lost at sea.

The presence of these substances in aquatic environments has been previously documented in drainage systems and rivers, CBS News has reported.

read more: https://www.cbsnews.com/news/cocaine-sharks-test-positive-drug-brazil-scientists-study/

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