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Cocaine Turns Salmon into Super Swimmers
22 Apr
Summary
- Salmon exposed to cocaine swam nearly twice as far.
- Cocaine's metabolite also significantly increased fish travel.
- Drug pollution poses a major risk to biodiversity.

A groundbreaking study released this week indicates that salmon exposed to cocaine in their environment exhibit significantly altered swimming behaviors. Researchers found that wild Atlantic salmon in Sweden's Lake Vattern, when exposed to cocaine and its metabolite, traveled approximately 1.9 times farther per week compared to a control group.
Individuals exposed to the drug's by-product also swam an additional 7.6 miles weekly. This research underscores a growing concern among scientists regarding the increasing presence of pharmaceuticals in waterways worldwide.
These findings suggest that drug pollution is not merely a societal issue but a concrete environmental challenge with potentially severe consequences for biodiversity. Scientists warn this poses a major and escalating risk to aquatic ecosystems.