As a fisherman in Maine’s groundfish industry, Geordie King is used to uncertainty: Once your net is cast, you never know what it will haul up when it returns, if it returns at all. This unpredictability holds true in general when it comes to the sea, which swayed King’s 49-foot, teal-hulled gillnetter, the Brittany Lynn, in gentle rolls as we sat in her wheelhouse, the boat’s engine idling beneath our feet.