What Happens Now?

THEY MADE IT. The boy and the man finally reached the coast.. but what happens now?  I have been wondering that this entire time while reading The Road. What happens when they get to the coast because if there aren't any fish in the bodies of freshwater then what makes the man think that there is anything in the ocean?

Obviously the ocean represents more than just a big and wide body of water.  However, the question is what?  Is it related to the man's past? Does it represent their survival on the deserted Earth?  Why is the ocean so special to the man?  All of these questions and I have no idea what the answer is to any of them.  

My personal theory behind the ocean is that the man has some connection between the ocean and his haunting past.  Why else would he obsess over the ocean and going south?  Yes, it is warmer but not by much.  The boy freezes his behind off when he swims in the ocean.  The man also says the water is colder than he thought it would be when he swam over to the boat. This leads me to believe that there is something else behind the oceans significance.  

Or maybe the ocean represents his lost wife.  The ocean never leaves him.  The ocean is forced to stay through this entire tragedy that fell upon the earth.  It may be possible that the man wanted to find the ocean not only to stay warm in the cooler months but to remember his wife.  Have something physically there that won't die or leave him.  

These are just my theories but whether they are right or wrong, we may never know.