The possibility that the sharks in the Gulf of Mexico have become addicted to the drugs thrown into the sea by drug traffickers to get rid of them or to be found later by their partners, scientists point out in a new documentary.

Shark expert Tom Hird teamed up with University of Florida environmentalist Tracy Fanara to see how sharks would react to packages that looked like cocaine balls dropped into the sea.

It turned out that the sharks at the sight of the packages, rushed and bit them furiously.

Also, during a dive, they spotted two sharks behaving strangely.

“Normally, our bubbles (from scuba bottles) usually scare hammerhead sharks away from people, so them attacking us is unusual behavior,” Hird said.

The documentary Cocaine Sharks will air on the Discovery Channel on July 26.