Is the sea water in Xiaoyangshan and Shengsi Islands blue? Or the color of sludge?

Xiaoyangshan is a deep-water port, which is being developed everywhere and close to Shanghai. Sea water is naturally yellow. If you want to see the blue sea, come to the small island of Shengsi Islands. Except for Xiaoyangshan and Li Zhushan Wharf, the seawater is not very clean due to traffic and other reasons, and the seawater in other places is bluer than one. Especially the island, blue and purple.