Oceans and other water bodies cover over 70% of Earth's surface, yet we know very little about them. I found the following ocean topographical maps at the UCSD Page. Please click on the images to enlarge them. (Red= < 1 mile, Blue=1-2 miles, Green=2+ miles)

**South China Sea and North Eastern Pacific**

**South Eastern Indian Ocean, Tasman Sea, Coral Sea, Arafura Sea**

**Mediterranean, Red Sea, Black Sea, Caspian Sea, Persian Gulf, and North Indian Ocean**

**North Pacific Ocean, Bering Sea, Arctic Ocean**

**North Atlantic, Hudson Bay, Baffin Bay, Greenland Sea**

**North Sea, Norwegian Sea, Baltic Sea, Gulf of Bothnia, White Sea, Barents Sea**

Here are a couple of maps showing the age of the ocean floor. You can see the youngest areas are near the mid-ocean ridges. I found these maps at NOAA.