Lake Texoma Fish Species: Blue Catfish The blue catfish is the largest freshwater sportfish in Texas. Where mature populations exist, 50-pounders are not unusual. Typically, the largest fish are caught by trotliners, some of whom have landed specimens in excess of 115 pounds. Rod-and-reel anglers have anded specimens in excess of 80 pounds. Catfish is the second most preferred group of fish among licensed Texas anglers, and blues rank third behind channel and