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Research Shows Magic Mushrooms Make Fish Lazier and Less Aggressive

Researchers found a low dose cut attack behavior and activity, suggesting the compound may selectively dampen escalated social conflict in a vertebrate model.

  • Researchers in Canada found that a low dose of psilocybin reduces aggression in adult mangrove rivulus fish, according to a study published in the journal Frontiers in Behavioral Neuroscience.
  • Mangrove rivulus are "innately aggressive," making them ideal for behavioral studies. Researchers used these self-fertilizing fish to ensure observed effects stemmed from psilocybin treatment rather than genetic variations.
  • Observation of behavior revealed that fish dosed with psilocybin performed fewer high-energy "swimming bursts" compared to control specimens. Suzie Currie, a biologist at The University of British Columbia, said these are "high-energy attack behaviors that represent an escalation of aggression."
  • Dayna Forsyth, a research associate at Acadia University, said psilocybin's calming effect appears to selectively reduce "energetically costly, escalated behaviors." This suggests the compound can dampen social conflict without shutting down behavior altogether.
  • Future studies can build on this work to explore how psilocybin alters neural signaling and serotonin pathways. Researchers caution that current findings do not test clinical treatments and results cannot yet be directly extrapolated to humans.
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Research shows magic mushrooms make fish lazier and less aggressive

Researchers in Canada tested whether the effects of psilocybin extend to the social behavior of the amphibious mangrove rivulus fish

·Chariton, United States
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Popular Science broke the news in United States on Thursday, May 7, 2026.
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