Photo taken on June 27, 2012 shows a robot arm of the manned submersible Jiaolong extracting submarine sediments in Pacific Ocean. China's manned submersible Jiaolong has successfully completed its program of deep-sea dives to 7,000 meters in the Mariana Trench in the Pacific Ocean. Through the program, oceanauts and scientists have explored the underwater geological structure and discovered 11 new species. [Xinhua]