Scientists made fish trip balls with magic mushrooms. It helped the fish with anger management. The research was done on a mangrove rivulus, a small Caribbean fish that is famously highly aggressive and territorial. If a stranger fish gets put into a mangrove rivulus's tank, it gets mad and will dart and lunge to chase the new fish out. Psilocybin (the psychoactive compound in magic mushrooms) was added which the fish absorbed through the gills and skin. It chilled the fish out. > moved around 80-100 fewer seconds during the trial > 2 to 3 fewer angry lunges at the stranger fish Not all aggression was turned off, but the explosive attacks dropped. A lot of studies show mushrooms help with sadness and fear in mice and humans. Aggression has been understudied in modern psychedelic research, especially in social settings. Why it matters. A fish brain is old in evolutionary terms. Fish and mammals split off from each other something like 400 million years ago. If psilocybin can dial down aggression in a fish brain, the wiring for aggression has probably been conserved across that distance. The same brake could exist in humans.