美國佛羅里達海岸的鯊魚在攝入毒販遺棄在海中的可卡因後表現出異常的行為。 當可卡因洩漏並污染海水時，鯊魚等魚類會攝入毒品並影響其大腦。 研究人員觀察到鯊魚不規則地移動，或注視一個想像的物件然後繞圈游動。

Sharks in Florida coast are showing erratic behavior after ingesting cocaine dumped off by traffickers. when the pack of cocaine leaks and pollute the water, fish like sharks will ingest the drug and affect their brains. Researchers observed sharks moving erratically, or focusing on an imaginary object while swimming in circles.

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