长颌鱼 Mormyrus caschive Linnaeus zhǎng hé yú

长颌鱼（Mormyrus caschive）又称淡水海豚，为骨舌鱼目，长颌鱼亚目，长颌鱼科，长颌鱼属一种特殊的淡水鱼类。长颌鱼分布于尼罗河下游流域及周边淡水湖泊，其构造独特，有一定的研究价值，同时体型较大、外形奇特，幼年时可作为观赏鱼，成体则是当地著名的游钓及食用鱼类。

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Mormyrus caschive, also known as freshwater dolphins, is a special freshwater fish of the order bony tongue fish, suborder longjaw fish, family longjaw fish and genus longjaw fish. Longjaw fish is distributed in the lower reaches of the Nile River and the surrounding freshwater lakes. Its structure is unique and has certain research value. At the same time, it is large and strange in shape. It can be used as ornamental fish in childhood, and adults are famous local swimming, fishing and edible fish.