Subject: how do plants live in salt water?

Doesn't it will die if too much water or too much salt? So why can the plant 
live at the bottom of the sea with too much water and salt? In addition, the 
pressure of the water is very strong. In addition, some light may go through 
the water and grow plant, but if one to five day were cover with cloud, would 
the plant still grow? Thank you to answer my question, please give as much 
answer as possible.

Re: how do plants live in salt water?