Synopsis
Deep in the heart of Africa, an elusive man-sized predator known as the tiger fish prowls the waters of one of the most powerful rivers. While locals believe this ravenous relative of the piranha is cursed, scientists believe the fearsome fish may hold the key to understanding the evolution of an extraordinary array of bizarre creatures found throughout the Congo. Journey into Africa's Congo River Basin as National Geographic embarks on a treacherous expedition to find out what powerful environmental forces created the tiger fish and to reveal the array of fantastic creatures that also inhabit this underwater Eden.