Photo taken by China's remote operated vehicle (ROV) Discovery shows a white sponge on the Caroline Seamount in the western Pacific Ocean, Aug. 14, 2017. China's remote operated vehicle (ROV) Discovery, carried by China's Kexue (Science) research vessel, dived to collect videos, information and samples from the Caroline Seamount in the western Pacific Ocean. (Xinhua/Xu Kuidong)
