China's manned sub collects perfect 'chimney vent' in Indian Ocean(1/6)

Photo taken on Jan 4, 2015 shows a piece of coral collected by China's deep sea manned submersible Jiaolong from seabed of a hydrothermal vent in the southwestern Indian Ocean. Jiaolong on Saturday collected a perfect "chimney vent" with several mussels and spiral shells living on it. (Xinhua/Zhang Xudong)