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Researchers discovered that low doses of psilocybin, a psychedelic compound found in magic mushrooms, significantly reduced aggressive attacks in mangrove rivulus fish without disrupting their normal social interactions. The findings suggest psilocybin may selectively calm escalating aggression rather than simply suppressing all behavior, pointing to a novel neurological mechanism for managing hostile conduct. The results in fish, though preliminary, hint at potential therapeutic applications for aggression management in other organisms.