Along similar lines of interesting memory studies of simpler lifeforms, there is an article titled "These Decapitated Worms Regrow Old Memories Along with New Heads"[0] and study [1] which can alter your assumptions on how and where memories are stored and retrieved.
Also there were claims starting in the 50s where planarians were taught a maze or to respond to certain stimuli and then fed to other planarians and that the trait would sometimes transfer as well. I don't know if any of those studies were reproduced, thus the claims might be dubious, but it would be interesting if they were true.
Also there were claims starting in the 50s where planarians were taught a maze or to respond to certain stimuli and then fed to other planarians and that the trait would sometimes transfer as well. I don't know if any of those studies were reproduced, thus the claims might be dubious, but it would be interesting if they were true.
[0] https://www.smithsonianmag.com/science-nature/these-decapita...
[1] https://pubmed.ncbi.nlm.nih.gov/13881412/