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Facts About The Ocean

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There are lots of fun and interesting facts to discover about the ocean. Here is a selection of them.

Ocean mapWorld’s ocean map. © Nat Geo.

Covers a large surface of the planet

In terms of the Earth’s composition, about 70 percent of the surface is actually ocean. Thus, most of the world is in constant darkness, since the average depth of the ocean is 12,400 feet and light can’t penetrate more than 330 feet below the water’s surface.

There are more aquatic life

Since so much of the planet consists of water, it should come as no surprise that 94 percent of life on Earth is actually aquatic, which means land-dwellers are very much in the minority!

Oceanic divisionsOceanic divisions. © Chris huh.

Half of the US is under the sea

Since the legal jurisdiction of the US also covers ocean territory, 50 percent of the US actually exists below the ocean.

Underwater treasures

The ocean is full of historical remnant and artifacts that any museum would love to be in possession of. There are probably more artifacts below the water than there is in all of the world’s museums.

Uncharted territory

Since there is such a lot of water to explore, exploration has only taken place in less than five percent of the Earth’s oceans. Indeed, any maps of the ocean floor are probably less helpful than the maps of Mars that have been produced.

Mariana Trench mapMap showing the location of the Mariana Trench, the deepest part of the ocean. It is 2,550 kilometers (1,580 mi) long, 69 kilometers (43 mi) wide and reaches a depth of 10.911 km or 6.831 mi.

Mid-Oceanic range

Mountains not only exist above ground but undersea as well since the longest mountain range can actually be found below the water line. It is known as the Mid-Oceanic Ridge and runs through the center of the Atlantic Ocean, into the Indian and the Pacific Ocean. This mountain range has peaks which are higher than those found in the Alps, while it covers over 35,000 miles, which equates to 23 percent of the Earth’s total surface.

Space exploration

Funnily enough, space exploration was given greater priority than exploring the Mid-Ocean Ridge, since divers only began to explore this mountain range from 1973, years after the first moon landing.

Amazing stuff underwater

There are some amazing finds under the ocean, with pillars that are several story high, and chimneys which actually release sulfuric acid, as well as underwater volcanoes, which instead of spewing out lava, release mud and methane. Plus, it is worth noting that under the water, there are also upside-down lakes and waterfalls.

Millions of viruses

Although there are a huge number of life forms under the ocean, many you will not be able to see without a microscope. Just a milliliter of ocean water contains about several million viruses. Don’t let this put you off going for a swim in the ocean, as most swimmers swallow some water without falling ill.

High pressure

One of the main barriers to further exploration of the deepest oceans it the pressure of the water on human divers. Incredibly, though, the pressure at the bottom of the ocean that would crush a ship has no effect whatsoever on ocean life, such as crabs and octopuses.

How much water pressure?

The pressure of water in the ocean at its deepest point is over 8 tons/sq inch, which is equivalent to the pressure a person will experience if he tries to hold 48 jumbo jets!

Deeper than the tallest mountain

The deepest point in the ocean is even deeper than the actual elevation of Mount Everest, which at its highest point is 5.49 miles above the sea level, while the deepest oceanic point is 6.83 miles.

There are a lot of gold in the ocean

All the oceans of the world taken together are believed to be concealing gold reserve weighing up to 20 million in tons and if all of that gold is mined out, each human on the planet can have gold weighing about 9 pounds!

Largest living structure

The Great Barrier Reef, which is considered as the world’s largest living structure at 1,243 miles, is also visible from the moon!.


It had been predicted by scientists that by 2010, 80 percent of the world’s population would start living within a distance of 60 miles from the coast. The total length of the coastlines existing on the planet sum up to 315,000 miles, which is 12 times the length of the equator!

If all of the ice melted

If all of the ice in the world melts down, the level of oceans would rise up by 200 ft, which was 330 ft 10,000 years back.

Volcanic activity

90% of earth’s volcanic activities occur inside the ocean, with the largest or the major concentration of active volcanoes being in the South Pacific.

How much water in the Atlantic Ocean?

The amount of water in the Atlantic Ocean is equivalent to the amount of ice in Antarctica!

Oceans are wonderful

Hopefully, you have enjoyed learning more interesting and fun facts about the ocean.

More about the ocean

  1. The Pacific Ocean facts
  2. The Indian Ocean facts
  3. Facts about marine biology

Related facts

  1. Facts about the beach
  2. Facts about islands
  3. Facts about coral reefs