A fishy tale
Fish is an important part of the diet in many parts of the world and is generally believed to be nutritious. But not all fish is good for you say Fazle Rabbi Chowdhury and Abdullah Al Mamun
The puffer fish takes its name from its tendency to puff its throat with water or air when predators approach or a threatening situation arises, giving the fish a balloon-like appearance. In different parts of the world the puffer fish has different names - blow fish, swell fish, balloon fish, toad fish, and globe fish, to name a few.1 In Japan it is popularly known as fugu.2 Fugu flesh is edible and is a delicacy in Japan costing about $400 (£230; €330) a meal.
Before preparing the fish, Japanese chefs are required to take an exam and get a special licence. During the exam - which has only a 25% pass rate - the chef must prepare and then eat the fugu meal. Despite these precautions some 100-200 people get fugu fish poisoning every year, and about half of these cases result in death.
Deaths have also been reported in