It may be the last place you'd expect to find corals -- up to 6,000 m (20,000 ft) below the ocean's surface, where the water is icy cold and the light dim or absent. Yet believe it or not, lush coral gardens thrive here. In fact, scientists have discovered nearly as many species of deep-sea corals (also known as cold-water corals) as shallow-water species... deep-sea corals don't need sunlight. They obtain the energy and nutrients they need to survive by trapping tiny organisms in passing currents... living even in waters as cold as -1ºC (30.2ºF)... occur in the waters of...