Swimmers have been warned to keep watch for a 1.5m great white shark spotted in Lake Illawarra. Horsley resident Scott Kelly, 38, photographed the juvenile shark yesterday morning after it took hold of his fishing line and surfaced 40m from his dinghy."I fought it for about 30 minutes then ... the dorsal fin popped out the surface," Mr Kelly said. "I thought, 'no way'."See Friday's Mercury for full coverage and more exclusive photos.