Great comment

They lack a central nervous system, but they do have a surprisingly robust information processing core. They use many of the same neurochemicals we use.

I have a lot of respect for cnidarian neurobiology, even if they don't have a brain per se.

Now... people with brains that make stoopid decisions... thems the ones I worry 'bout.

Oh, wait............

Prevagen is a dietary supplement that contains apoaequorin, a protein derived from the jellyfish Aequorea victoria. However, there is no reliable evidence that it improves memory or brain function, and its claims have been deemed misleading by regulatory authorities.

Nevermind.