Two dolphinfishes, also known as Mahi-mahi, are photographed aboard the US drilling ship JOIDES Resolution during an expedition to the South China Sea, Feb 22, 2017. Scientists from different countries are on the JOIDES Resolution for an expedition to the South China Sea. As part of the International Ocean Discovery Program (IODP), they will explore the mechanisms of lithosphere extension during the continental breakup.[Photo/Xinhua]