The Japanese pufferfish, also known as fugu, is a species of pufferfish found in the coastal waters of Japan. It is famous for its unique ability to inflate its body when threatened. This fish contains a potent toxin called tetrodotoxin, which can be deadly if consumed improperly. Fugu is considered a delicacy in Japanese cuisine, but it must be prepared by licensed chefs who are trained to remove toxic parts safely. Despite the risks, many people enjoy fugu for its delicate flavor and unique texture, making it a sought-after dish during special occasions.