Orderable in: Japan
The pufferfish is the second most poisonous vertebrate in the world, after the gold poison frog. As such, it'd surely ruin your day to eat one, right? The tetrodotoxin found in its ovaries, liver, and flesh has been know to cause paralysis, vomiting, and death. As such, Japan has strict safeguards in place, and chefs have to go through rigorous certification before they're ever allowed to prepare a puffer and subsequently serve it up as soup or sashimi.