The ocean may look calm, but there’s something lurking below. Walter Szulc Jr. was paddling his kayak when he turned to see the fin of an approaching shark at Nauset Beach in Orleans, Mass., in the summer of 2012. Fortunately, no injuries were reported, but it certainly wasn’t the first or last sighting in the area. A few days before, two sightings were reported, and the previous week a great white was seen off Chatham as the first confirmed sighting of the season. The reason why so many sharks are drawn to the area is no mystery: it’s filled with seals, a favorite snack of theirs.