Traces Of Cocaine Found in Brazilian Sharpnose Sharks

Researchers have discovered traces of cocaine in Brazilian sharpnose sharks off the coast of Rio de Janeiro. The findings, documented by scientists at the Oswaldo Cruz Foundation, mark the first instance globally where cocaine has been detected in sharks.

Between September 2021 and August 2023, researchers captured and examined 13 sharks (10 female and 3 male) from the coastal waters of Rio de Janeiro. Shockingly, all tested positive for cocaine in their muscle tissue and livers. Further analysis revealed the presence of benzoylecgonine, a major cocaine metabolite, indicating substantial exposure to the drug.

The exact pathway through which the cocaine entered the sharks remains unclear to scientists. However, several hypotheses have been put forward. One possibility is that packs of cocaine discarded or lost by smugglers at sea could have contaminated the marine environment. Alternatively, researchers suspect that cocaine residues might have entered the coastal waters through discharge from raw sewage in rivers and urban canals.

This discovery raises significant concerns about the impact of drug pollution on marine life. The presence of illicit substances in marine ecosystems underscores the need for further research and proactive measures to mitigate potential environmental and biological consequences.