eWhat to use when feeding on insects

Went fishing today up at rodman, and one fish skunked my all day long. He had to be at least 12-15 lbs. I threw every lure I had and used every conventional and non conventional retrieve I could think of. This monster just kept swimming in about a 20 foot wide circle. I saw him come out of the water about 40 times today. If I had some flies I might have caught him. The only lure he was interested in was a 8" Shallow diving Shiner Crankbait. He had just rolled up on some bugs when it went by and he made a quick turn and took a b-line straight towards the lure. The water was rising up over his back as he got closer and closer to the lure, he got right up on it and stopped dead in his tracks. That was the only interest he showed. Then he continued feeding on insects. Talk about frustrating. It was an awsome expierence to be able to shore fish and see a fish this big and for as long as I got to see him. He stayed in the same area making the same circle for at least 4-5 hours today. I'll be back tommorow with some live shiners.