National Geographic : 2001 Oct
MARINE LIFE Portraitof a Coral Reef Photographicinnovation allows wide-view image Coral reefs that grow to form a large wall have always been magnets for scuba divers. Making wide view images of those reefs, such as renowned Bloody Bay Wall off Little Cayman Island in the British West Indies, has been a challenge for professional pho tographers. At even moderate depths in good-quality water, clarity fades beyond a few feet using traditional underwater lights. "Also, most of the color spectrum except blues and greens is absorbed," says San Diego photographer Jim Hellemn, who eventually solved the problem.