A researcher takes samples from spider crab captured in the cold vents of south China sea, south China by China's manned deep-sea submersible Jiaolong, June 19, 2013. Jiaolong finished the first diving operation for its first voyage of experimental application in the South China Sea on Monday, a large amount of images were captured during its maiden voyage. Qiu Jianwen, a professor from Hong Kong Baptist University, obtained deep-sea samples in the cold vents of the South China Sea during a dive conducted on Wednesday.(Xinhua/Zhang Xudong)