This picture was taken from a boat while traversing the river in sundarbans. This image shows what exactly the forest cover looks like during low  tides. During high tides the roots of the mangrove are completely submerged.
<a href="//commons.wikimedia.org/w/index.php?title=User:Dhara_c&amp;action=edit&amp;redlink=1" class="new" title="User:Dhara c (page does not exist)">Basundhara Chowdhury</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>