A Cambodian man grimaces as he comes face-to-face with a giant barb on the Tonle Sap River near Phnom Penh. Fishermen along the Tonle Sap catch five to ten adult giant barbs each year, making the region one of the last places on Earth to see these impressive fish at their largest.
The world's largest freshwater fish are losing the fight for survival as pollution, overfishing, and construction threaten the rivers and lakes they call home.