Fly fishing for huge trout at Pyramid Lake can be pretty incredible. This underwater video we took shows exactly why the trout in Pyramid get so big: giant schools of 12-14 inch Tui Chub, the main food source for the trout. Video was shot with a GoPro Hero 4 Silver and a GoPro Hero 5 Black in 32 feet of water. The Cui-ui seen in the video are an endangered species, and the only spot in the world they can be found is in Pyramid Lake.