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  1. Sharks in Brazil test positive for cocaine, say scientists

  2. First 'Cocaine Sharks' Discovered off Brazil | Scientific American

  3. Cocaine sharksfound in waters off Brazil | Science - AAAS

  4. Not Afraid of Sharks? Well, Now They’re on Cocaine.

  5. Thirteen Sharks Test Positive for Cocaine Off the Coast of Brazil

  6. Sharks test positive for cocaine near Rio de Janeiro, Brazil - NPR

  7. Why have Brazilian sharks tested positive for cocaine?

  8. "Cocaine sharks": Predators off coast of Brazil test positive for …

  9. Sharks off Brazil coast test positive for cocaine - BBC

  10. 'Cocaine sharks' in Brazil expose ocean pollution - National …