22 Facts about Ocean

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1. The oceans occupy nearly 71% of our planet's surface.

2. More than 97% of all our planet's water is contained in the ocean.

3. The top ten feet of the ocean hold as much heat as our entire atmosphere.

4. The average depth of the ocean is more than 2.5 miles.

5. The oceans provide 99 percent of the Earth's living space- the largest space in our universe known to be inhabited by living organisms.

6. More than 90% of this habitat exists in the deep sea known as the abyss.

7. Mount Everest (the highest point on the Earth's surface 5.49 miles) is more than 1 mile shorter than the Challenger Deep (the deepest point in the ocean at 6.86 miles).

8. The average temperature of the oceans is 2ºC, about 39ºF.

Water pressure at the deepest point in the ocean is more than 8 tons per square inch, the equivalent of one person trying to hold 50 jumbo jets.
The worlds oceans contain nearly 20 million tons of gold.
The color blue is least absorbed by seawater; the same shade of blue is most absorbed by microscopic plants, called phytoplankton, drifting in seawater.
A new form of life, based on chemical energy rather than light energy, resides in deep-sea hydrothermal vents along mid-ocean ridges.
A swallow of seawater may contain millions of bacterial cells, hundreds of thousands of phytoplankton and tens of thousands of zooplankton.
More than 90 percent of the trade between countries is carried by ships and about half the communications between nations use underwater cables.
Eighty per cent of all pollution in seas and oceans comes from land-based activities.
Plastic waste kills up to 1 million sea birds, 100,000 sea mammals and countless fish each year. Plastic remains in our ecosystem for years harming thousands of sea creatures everyday.
Over the past decade, an average of 600,000 barrels of oil a year has been accidentally spilled from ships, the equivalent of 12 disasters the size of the sinking of the oil tanker Prestige in 2002.
Although coral reefs comprise less than 0.5 per cent of the ocean floor, it is estimated that more than 90 per cent of marine species are directly or indirectly dependent on them.
There are about 4,000 coral reef fish species worldwide, accounting for approximately a quarter of all marine fish species.
Nearly 60 per cent of the world's remaining reefs are at significant risk of being lost in the next three decades.
The major causes of coral reef decline are coastal development, sedimentation, destructive fishing practices, pollution, tourism and global warming.
Populations of commercially attractive large fish, such as tuna, cod, swordfish and marlin have declined by as much as 90 per cent in the past century.