Humans will risk death to ingest or otherwise put things in their body, but not usually because they're tasty, usually because they're addictive.
Do dolphins get high on octopus?
Do dolphins get high on octopus?
"Pufferfish produce a potent defensive chemical, which they eject when threatened. In small enough doses, however, the toxin seems to induce "a trance-like state" in dolphins that come into contact with it"
Although I just learned from Wikipedia that apparently we figured out how to raise non-poisonous pufferfish. Neat.
Perhaps it's only worth eating for the thrill?
I have a Japanese friend who explained the fugu thing to me (at least, the way he saw it). Every once in awhile a group of people die when they eat fugu that's not prepared properly. So when you go out with your colleagues you try to work the latest such incident into the conversation, and then you order fugu. The goal is to eat it with the supreme nonchalance while trying to make your coworkers visibly nervous.
> The goal is to eat it with the supreme nonchalance while trying to make your coworkers visibly nervous.
We eat raw pork mixed with raw eggs and raw onions on a bun in Germany. But nobody there thinks it's particularly dangerous. (https://en.wikipedia.org/wiki/Mett)
On the other hand, many people eat octopus, some even eat it alive. If eating octopus would produce the slightest drug effect, I think that we, humans, will know it :-)
And yes, of course there is a lot of bibliography available about dolphin behaviour.