Anhai Bay is the estuary of the Shijing River. It separates Shijing Town (west side) from Dongshi town (east side). This is a tidal estuary; much of its bottom is exposed in low tide, and is used for something that looks like a form of oyster cultivation. 
These photos were taken from the west side of the bay, between Shijing and Shuitou; Dongshi Town's skyline can be seen in the background of some photos.
<a href="//commons.wikimedia.org/wiki/User:Vmenkov" title="User:Vmenkov">User:Vmenkov</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>