Let’s say the chef does indeed prepare the poison blowfish incorrectly. What now? According to Delishably, tetrodotoxin immediately attacks the nervous system. First, a numbness or tingling around the mouth occurs, then paralysis, then death (via BBC). But let’s back up to what happens before the end. 

Per Ranker, while the tingling sensation spreads, it’s likely that nausea, vomiting, and diarrhea will come next. From there, the loss of motor and autonomic functions will occur, putting the victim in a zombie-like state. The worst part? Although the body will become fully paralyzed, the mind remains conscious through it all.

As the CDC explains, what actually kills is respiratory arrest. The poison paralyzes the breathing center which causes the throat to swell, thus leading the heart to stop. The onset of the poisoning can occur either in the first few minutes after consumption or hours later. 

What can be done if one believes they’ve eaten a poisonous batch of fugu? Vomit profusely and drink plenty of water. There is no known antidote. However, victims who live through the first 24 hours usually recover. If ever in Japan and someone offers this as a meal, perhaps take all of this into consideration.