So we see ads all the time on TV for Prevagen, a memory enhancement product.
https://www.prevagen.com/about-prevagen/
Now the main ingredient "found in jellyfish" is the thing that does the job.
How long have jellyfish been known for their memory?
What leads them to this conclusion? I bet someone thought, "I wonder if I eat these jellyfish, if my memory will improve."
Only jellyfish I know are the ones we had in the Chesapeake Bay and they sting you. Then I guess you don't forget THAT.