Fish a small lake this morning. Clear blue skies, surface water temp was 59 degrees, no wind to speak of. Started early casting small (8,10) green Carey Specials with floater on 3 weight towards shore over sunk logs and put a couple of fish on the line. Bite stopped after sun got on the water so switched to the 4 weight, a type III tip with a black leech pattern and dragged bottom about 14 feet deep. This also brought a few to hand. Noticed a small midge hatch so back to the 3 weight, floater, and switched up flies ending with an emerger which again started producing. All in all got about 10 fish this morning largest around 17 inches with most in the 14 inch range. Now the question for you lake experts. When I was dragging bottom with the leech I had 2 fish swallow the fly deep enough I had to leave the fly in the fish. The other couple of fish hooked with the leech took the fly deep but I was able to remove the fly successfully. Fly was slowly twitched along the bottom. Why was this fly and method taken so deeply?