Ok, my friend and I were digging a tunnel and decided to see how deep in we were..and dug upwards and hit the ocean. I then noticed that the water flowed down our tunnel..and stopped 1 square away from the end-wall.
If the bloody OCEAN was pouring into our tunnel, which was blocked at both ends (I was trying to flee my friends TNT and hid myself), logic kind of says the volume of water would be enough to flood the tunnel to the ceiling.
We rather wondered why this was not the case and were wondering if that would be implimented at any time? It would make spelunking allot more dangerous and thus allot more fun!