I understand it when we catch fish high up on planer boards that don't show up on the fishfinder. Can anyone explain where the fish come from while trolling in 54 f.o.w. with dipseys around 40 feet down and a blank screen on the fishfinder. Are the fish shooting up from 14 feet down to smack those spoons? I can't believe that every single fish is swimming out from under the boat as we troll. But a walleye swimming up 14' to smack a spoon on a slow day doesn't sound believable either.