Jack Brand
Aquatic ecologist at the Swedish University of Agricultural Sciences who studies how human-derived drugs in waterways affect fish behavior, and lead author of the study that exposed salmon to cocaine and its metabolite.
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May 12, 2026 • 10min
Why Swedish scientists gave salmon cocaine
Jack Brand, an aquatic ecologist at the Swedish University of Agricultural Sciences who studies how human drugs in waterways affect fish behavior. He describes surgically exposing salmon to cocaine and its metabolite, finding the breakdown product had surprising potency. The team tracked altered movement and energy use, pondered long-term and cocktail effects, and discussed advanced wastewater fixes.
