The blue catfish looks much like the channel cat, except the blue has a humped back, a longer anal fin, and grows bigger. Blues are native to several rivers in northeastern Kansas including the Kansas and Missouri. Blues are seldom caught on the concoctions used for channel cats, preferring cut or live bait. The largest blue cat on record weighed 109 pounds, 4 ounces. The Kansas record weighed 102.8 pounds.