This is quote from wetweb.
"The toxin found in pufferfish is called Tetraodontin, which gets its name from the puffer, even though this toxic substance is found in many different species around the world. Creatures like the rough-skinned Newt, and many varieties of frog like the Harlequin frogs of central America, all have this located in the skin, thus making ingestion the only way of getting poisoned. But other creatures like the Blue-ringed Octopus, which delivers the same toxin, uses it's bite to do the job. As a special note, I would like to add in that this toxin is the main ingredient found in Voodoo Zombie Powder from Haiti. Also, this same stuff is responsible for over 150 human deaths last year in Japan. This is due to the Japanese tradition of eating of raw "fugu" pufferfish. Many people wonder why a person would risk eating something that could kill you. Is it just for the thrill, or is there another reason. People that I have talked with that have tried eating puffer, say that you gain an odd euphoric feeling after eating it. Your body gets a tingling sensation in the extremities, and you have a unique “high” sensation. Scientific reason for this; you are actually getting ultra small doses of neurotoxin, that is stunning your body and nervous system. Sort of takes the mystery and awe out of it now doesn't it…"
