Photo taken on June 4, 2017 shows a sponge sample collected by manned submersible Jiaolong during its dive in Yap Trench. Jiaolong began diving at 8:43 a.m. local time on a rainy day. There will be five dives for Jiaolong in the Yap Trench, and the last dive is planned for June 12. The dives will focus on research in deep-sea biotic communities and gene resources, according to scientists on the ship Xiangyanghong 09. (Xinhua/Liu Shiping)
