A staff member dives in the sea area of Wuzhizhou Island in Sanya, south China's Hainan Province, April 27, 2020. (Xinhua/Yang Guanyu)

Countries across the world will observe World Oceans Day on Tuesday. This year's theme, "The Ocean: Life and Livelihoods," highlights the importance of oceans for the life and activities of the global community.

In China, this year's World Oceans Day will be marked with a focus on protecting marine biodiversity and raising public awareness on the harmonious coexistence between humankind and nature.

A Bryde's whale forages in waters off Weizhou Island in south China's Guangxi Zhuang Autonomous Region, Jan. 15, 2021. (Xinhua/Liu Jinhai)

 

Staff members hang small coral fragments at a coral nursery of the Wuzhizhou Island scenic area in Sanya, south China's Hainan Province, April 28, 2020. (Xinhua/Yang Guanyu)

 

Photo taken on Sept. 30, 2020 shows the sea view as seen from Dongbi Village at Sansha Town of Xiapu County in Ningde, southeast China's Fujian Province. (Xinhua/Wei Peiquan)