Pufferfish
Although pufferfish’s meat is considered a deliciously expensive cuisine, you might do well to avoid this fish on the plate and in the sea. Their spikes are filled with nerve toxins that are deadlier than cyanide and can kill humans quick and easily. But their venom is also present in their liver, muscles, gonads and kidneys as well, so if a chef isn’t properly licensed and experienced to prepare these creatures for consumption, the rare delicacy can turn into someone’s last meal.