My son went fishing for Stripers yesterday in a Northern Cali Lake. Earlier in the day the stripers were chasing bait in the shallow areas. He caught several nice ones in the 15 to 18# size. By 10-11 am, the sun had heated up the water, and the stripers left the shallow area. He then found them and their bait at 50 plus feet deep in the lake. He and I have sinking fly lines to get you down that far, but most of the sport is out. Even a 40+ striper will not fight that hard (it is all relative) on a sinking fly line when hooked deep.