64 Size of the Pacific Ocean, the largest of the four main oceans, in millions of square miles
5 Size of the smallest main ocean, the Arctic, in millions of square miles
39 Average temperature, in degrees Fahrenheit, of all the oceans
12,144 Average depth, in feet, of all the oceans
180 Baltic Sea's average depth, in feet
180 In feet, the deepest place in the ocean, the Pacific's Marianas Trench, which is deeper than Mount Everest is tall
80 Percentage of all life on Earth beneath the ocean's surface
97 Percentage of the world's water that's salty
752 Measured at a hydrothermal vent, the hottest ocean temperature, in degrees Fahrenheit
25,000 Approximate number of islands in the Pacific, more than the rest of the oceans combined
Did You Know?
What's the difference between a dolphin and a piling? Dolphins are three or more pilings lashed together.