Fish Tripping Balls

“Fish on PCP also showed more erratic swimming behavior. Collins also looked at social behavior in the shoaling test. Zebrafish are social, and like to shoal together, but will show differences in social behavior in response to different drugs. When Collins gave the fish mescaline, the fish appeared to be more social, showing decreases in inter-fish distance. Psilocybin and PCP also produced increases in the stress hormone cortisol.”
 — Scientists are testing hallucinogenic drugs on fish now.