https://www.theguardian.com/us-news/2023/jul/22/cocaine-sharks-drugs-florida-coast

A hammerhead, a species that would usually swim away from humans, came directly towards the divers, moving erratically. They also observed a sandbar shark swimming in circles as it apparently focused on an imaginary object.

They also conducted experiments, including dropping dummy [cocaine] bales in the water, which many of the sharks took bites out of, and loading balls of bait with highly concentrated fish powder to simulate cocaine.

The effect, the researchers said, was akin to catnip on felines. “It’s the next best thing [and] set their brains aflame. It was crazy,” Hird says on the show.

Fanara said they chose the Florida Keys as the best location for their research because a convergence of ocean currents made the region “prevalent” for floating bales of cocaine.