Overview: Vâgner travels in search of the Nile perch in Kenya. This megafish can grow to about 6 feet, 440 pounds, and could be a popular export for the country, except for concerns about a potential parasite that may make the perch dangerous to eat. Vâgner is called in to catch the freshwater beast for scientists to examine and determine if there is in fact a deadly parasite problem. But extreme heat, wind and sandstorms make the journey treacherous and have Vâgner struggling to push on.