The couple said the net they normally use could barely fit the fish. Officials said the hybrid trout had a circumference of 21 inches and likely weighed between 17-20 pounds. According to the department, Henrys Lake in eastern Idaho is famous for its blue-ribbon trout fishing and is home to native Yellowstone cutthroat trout. Officials said Thomas took a few photos with the record-setting fish before releasing it back into the lake.