View the word search for this feature. Being surrounded by sharks may sound like a bad thing, but scientists say sharks are actually a good sign of ocean health. Even knowing that, Enric Sala, a marine ecologist and National Geographic Fellow, was a little nervous when he first dived at Kingman Reef, the heart of a massive, newly protected area south of Hawaii now called the Pacific Remote Islands Marine National Monument. "The first time I jumped in the water, as soon as the bubbles cleared, my heartbeat doubled—there were a dozen sharks swimming around us and so many corals on the botto...