A Mediterranean sea bream known as Sarpa salpa, or salema porgy, can trigger vivid, prolonged hallucinations when consumed under certain conditions, a phenomenon documented in modern medical literature and popularly linked to ancient practices.
The fish, also called the dreamfish, accumulates toxins from its algal diet that may produce effects lasting up to 36 hours or longer, according to case reports. Claims that ancient Romans used it recreationally circulate widely, though primary classical sources do not explicitly confirm intentional hallucinogenic use.
This is Sarpa salpa, a fish that causes vivid LSD-like hallucinations when eaten and was used as a recreational drug in Ancient Rome. pic.twitter.com/PdAbXVuxlr
— Massimo (@Rainmaker1973) July 27, 2026
What Is Sarpa salpa and How Does It Work?
Sarpa salpa is an herbivorous sea bream native to the Mediterranean Sea and the eastern Atlantic coast of Africa. It features distinctive golden stripes and feeds primarily on seagrass and algae, including Posidonia oceanica and invasive species such as Caulerpa.
Ingestion of the fish, particularly when the head, brain, or internal organs are consumed or the fish is not properly cleaned, can lead to a rare form of food poisoning called ichthyoallyeinotoxism. Symptoms include visual and auditory hallucinations, nightmares, dizziness, loss of coordination, and sometimes mild digestive issues. Effects typically begin within minutes to a few hours and resolve within 24 to 36 hours, often with amnesia of the episode.
A 2006 report published in Clinical Toxicology (Volume 44, Issue 2; received March 2005, accepted March 2005, and published online in October 2008) detailed two cases from the French Riviera. 40-year-old man experienced terrifying visual and auditory hallucinations after eating Sarpa salpa at a restaurant and recovered after 36 hours with no memory of the events. A 90-year-old man had auditory hallucinations two hours after eating the fish, followed by nightmares for two nights, recovering after three days.
Scientists attribute the effects to toxins accumulated from phytoplankton or epiphytic algae on seagrass rather than compounds produced by the fish itself. The toxicity varies by season and is more likely when the fish graze certain plants. The exact compounds remain unidentified, though hypotheses include indole alkaloids chemically similar to LSD or other neurotoxins.
In Arabic, the species is traditionally known as “the fish that makes dreams.”
Historical Use and Documentation
Popular accounts state that ancient Romans consumed Sarpa salpa—sometimes focusing on the brain—at banquets for its mind-altering properties, and that Polynesians used similar fish in ceremonies. These claims appear in secondary sources but lack direct support from surviving classical texts.
Modern summaries of the Roman recreational use often trace back to later interpretations of Mediterranean fishing knowledge rather than primary Roman records.
Traditional knowledge of the fish’s properties has existed for generations among Mediterranean and North African coastal communities. Documented modern scientific attention increased with case reports in the 1980s and 1990s, culminating in the formal 2006 clinical description.
Current Status and Research
Sarpa salpa is still caught and served in Mediterranean restaurants when properly prepared by removing the head and viscera, which concentrates the toxins. Poisonings remain rare. It is not used as a recreational substance due to the unpredictable and often distressing nature of the hallucinations.
Researchers continue to study the fish. A 2024–2025 collaborative project through the France-Stanford Center for Interdisciplinary Studies examined “Dreamfish Toxins: Implications for Health in a Warming Ocean.” Led by scientists including Lauren O’Connell of Stanford University and Eric Durieux of the University of Corsica, the work investigates the dietary origin of the toxins, interactions with invasive species, and potential effects of ocean warming on seagrass ecosystems and human health.
No pharmaceutical development of the fish’s compounds for medical use has been reported. Interest centers on ecological impacts and toxin identification rather than therapeutic applications.
Positive and Negative Effects
Negative effects dominate documented cases. Hallucinations can be terrifying, involving aggressive animals, screams, or distorted perceptions that impair driving or behavior. Additional symptoms may include nightmares, temporary mental depression, and physical discomfort.
Recovery is generally complete, but the experience is described as distressing.
No established positive therapeutic effects exist for human consumption. Potential scientific value lies in identifying the toxins for better understanding of marine food webs, climate-related changes in toxin distribution, and possible insights into neurological pathways, though this remains exploratory.
Similar Findings in Nature
Other fish species produce comparable effects under the category of ichthyoallyeinotoxism. These include certain sea chubs (Kyphosus species), the little spinefoot (Siganus spinus, known as “the fish that inebriates” on Réunion Island), and the yellow-striped goatfish (Mulloidichthys flavolineatus, called “chief of ghosts” in Hawaii).
The phenomenon of Sarpa salpa is one example of how ordinary seafood can occasionally produce extraordinary neurological effects through ecological transfer of compounds. Proper preparation remains the practical safeguard for those who encounter the species.
Provided by Dallas Express
