Subject: A tunnel from one side of the Earth getting to the bottom of an ocean

I apologize for coming back with a similar Smarandache problem, but it 
seems that an exact question about tunnels like this has not been answered.
Thus: Let's consider a tunnel getting from a side to the other side of the 
Earth, and passing or not passing through the center of the Earth.
Suppose the second side of the tunnel gets in the bottom of an ocean.  Will 
the water flow down into the tunnel only up to the center of the Earth, or 
even lower near to the first side (to compensate/equilibrate somehow, about 
the Earth center, the water masses from both sides of the Earth center), or 
even will flood out the first side?

Re: A tunnel from one side of the Earth getting to the bottom of an ocean