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

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

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

  7. Sharks off Brazil coast test positive for cocaine - BBC News

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

  9. Why have Brazilian sharks tested positive for cocaine?

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