Coked to the gills? Cocaine-laced wastewater can make salmon roam twice as far

By Marcus Michelangeli, Lecturer, Environmental Sustainability and Management, Griffith University
Jack Brand, Researcher in Behavioural and Movement Ecology, Swedish University of Agricultural Sciences

Fish or sharks on cocaine might sound like something dreamed up in a Hollywood writers’ room, but the reality is far less entertaining. Increasingly, scientists are detecting cocaine and other powerful drugs in aquatic environments, and even in the brains and bodies of wildlife.

A 2024 study from Brazil made headlines after finding cocaine in the muscles and liver of wild…

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