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Pufferfish
Almost all pufferfish contain tetrodotoxin, a neurotoxin that is very dangerous for humans. There is enough toxin in one pufferfish to kill 30 adult humans. So of course the natural thing to do would be to risk your life to eat a bit of them, right? As a delicacy in Japan (where it is known as fugu), even the most skilled and well-trained chef cannot guarantee eating it won’t kill you. In fact, it was reported that in 1958, 176 people died eating it.
