Its reputation as a man-eating predator aside, the great white shark is emerging as a boon for tourism on Cape Cod. Unlike in Jaws, in which a great white terrorizes a small island, the sharks that have been spotted in growing numbers are stirring more curiosity than fear — and a buying frenzy for shark-related merchandise. Shark T-shirts are everywhere and Jaws has been playing in local movie theaters. Still, officials are wary of the damage that could be done to tourism if one of the predators bites somebody. Brochures have been distributed to raise awareness of sharks and safe practices in the event of a sighting.