Pufferfish have a terrifying poison called tetrodotoxin. This poison, if eaten, can kill at an alarming speed. Nothing about the pufferfish’s poison will damage any part of your insides. Instead, it is designed to shut down your body via paralysis. Tetrodotoxin simply blocks your nerves from talking to each other. If they can’t do that, then, well, you can’t move. If your nerves aren’t telling each other that it is time to inhale, guess what you’re not going to do? Scary right? Death by paralysis, not a way that I would want to go.