Which prized Japanese fish is so poisonous that chefs must undergo years of training and obtain a special license to prepare it?

The Japanese pufferfish Fugu is so deadly that a single fish contains enough poison to kill 30 people! Thanks to Japan's ultra-vigilant licensing requirements, however, you can try this pricey delicacy without fear of death (if you happen to be in Japan during Fugu season, that is).

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