Abstract: A fishing bobber incorporates a heating element in the interior thereof that is adapted to be supplied with current from an external power pack by way of a water impervious plug and jack connection. When used in ice fishing applications, the heated bobber functions to keep the water from refreezing in the ice hole. When a fish strikes and drags the bobber down into the water, the plug and jack separate so that the battery pack and lead wires are not dragged into the ice hole.