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Takifugu is a genus of pufferfish, often better known by the Japanese name Fugu (Japanese: 河豚, literally "river pig"). There are 25 species belonging to the genus Takifugu, which can be found worldwide from about 45° latitude north to 45° latitude south, mostly in salt water, but sometimes also in fresh water or brackish water. Their diet consists mostly of algae, mollusks, invertebrates and sometimes crustaceans. The fish defend themselves by inflating their bodies to several times normal size and by poisoning their predators. These defenses allow the fish to actively explore their environment without much fear of being attacked.

The fish is highly toxic, but despite this — or perhaps because of it — it is considered a delicacy in Japan. Every year a number of people die because they underestimate the amount of poison in the consumed fish parts. The fish is featured prominently in Japanese art and culture.