Cavalla River
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The Cavalla River (also known as Cavally, Youbou or Diougou river) is a river in West Africa running from north of Mount Nimba in Guinea, through Côte d'Ivoire, to Zwedru in Liberia, and back to the border with Côte d'Ivoire. It ends in the Gulf of Guinea 21 km east of Harper, Liberia.
It has a length of 515 km. The name is derived from the cavalla horse mackerel found at its mouth.