I got curious and looked into it a bit, it was pobably not actually shrooms. It was more likely ergot, rhododendron honey, or hallucinogenic bream. These seem to be the hallucinogenics of choice in Greece, Anatolia, and the Levant during the first and second centuries CE. I didn't even know you could get high from just eating a fish.
See everyone thinks the part of the bible about Jesus multiplying fish and bread was because people wanted to eat, but actually they just wanted to trip balls on moldy bread and magic bream.