Tic, tic, tic: I could feel my two-ounce bucktail jig bouncing lightly across the remnants of the centuries-old oyster bed some 70 feet below. On this windy, mid-December day, even with gloves my hands were aching cold and my fingers growing numb. Then, finally, something below felt different, and I slammed my rod back hard. The tip arced over, hesitated, and my whole rod was pulled down, almost to the gunnel....