A peculiar lens-shaped structure observed in the South China Sea

Jianyu Hu1, Hongyang Lin2, Zhiyu Liu1, Igor Belkin3, Zhenyu Sun4 and Jia Zhu5, (1)Xiamen University, State Key Lab of Marine Environmental Science, Xiamen, China, (2)Xiamen University, Xiamen, China, (3)University of Rhode Island Narragansett Bay, Narragansett, RI, United States, (4)Xiamen University, State Key Laboratory of Marine Environmental Sciences, Xiamen, China, (5)Xiamen University, State Key Laboratory of Marine Environmental Science, Xiamen, China