A species of bream, sarpa salpa, which can trigger hallucinations when eaten, has been been discovered in British waters due to global warming.
… according to marine experts, certain species of plankton-eating fish, like the sarpa salpa, can give off hallucinogenic fish poisoning if the heads or other body parts are consumed.
The effects include vivid hallucinations within minutes of eating it which can last for days.
In 2006 two men, one aged 90, were hospitalised in the south of France after eating sarpa salpa.
The elderly man suffered from auditory hallucinations a couple of hours after eating the fish followed by a series of nightmares over the next two nights.
The younger man, aged 40, endured similar effects which took 36 hours to disappear.