One third of the sharks tested positive.
Marine biologists found detectable levels of caffeine, cocaine and the over-the-counter painkillers in the blood of 28 sharks.
Learn how cocaine, caffeine, and common painkillers are entering Bahamian waters, how they ended up in shark blood, and what ...
The animals can experience behavioral changes as a result ...
Add Yahoo as a preferred source to see more of our stories on Google. Marine biologists in the Bahamas tested shark blood to study the animals' health and made a shocking discovery. Photo by JESUS ...
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Sharks Showing Unusually High Levels of Cocaine
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