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The wonders of the deep - Oceans make up 70% of the Earth’s surface.

(Photo by George Kedenburg III)

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The wonders of the deep - The oceans house more than 90% of the planet’s living biomass.

(Photo by Francisco Jesús Navarro Hernández)

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The wonders of the deep - Land-based activities account for 80% of all pollution found in seas and oceans. 

(Photo by Master Wen)

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The wonders of the deep - About 40% of the world's population lives within 60 km (37 mi) of the coast.

(Photo by Jay)

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The wonders of the deep - And 80% of the population lives within 100 km (62 mi) of the coast. Three-quarters of the world’s mega cities are located near the sea.

(Photo by Giancarlo Revolledo)

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The wonders of the deep - Polluted coastal waters cost the global economy billions of dollars a year in related illnesses and death. 

(Photo by Alex Palmer)

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The wonders of the deep - In the early 2000s, hepatitis from tainted seafood had an economic impact of US$7.2 billion, according to this book.

(Photo by Robert Claypool)

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The wonders of the deep - The Pacific Ocean covers around 30% of the Earth’s surface, making it the planet's largest ocean.

(Photo by jean wimmerlin)

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The wonders of the deep - Plastic that winds up in the oceans kills up to one million sea birds, 100,000 sea mammals, and countless fish every year.

(Photo by Elijah M. Henderson)

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The wonders of the deep - Pacific Ocean means “peaceful sea” in Latin.

(Photo by Jan Traid)

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The wonders of the deep - Sea ice covers 15% of the oceans.

(Photo by Pablo Martinez)

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The wonders of the deep - About 90% of icebergs are submerged, so what we see is really just the tip.

(Photo by David Clode)

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The wonders of the deep - Sounds travels 4.3 times faster underwater compared to air. 

(Photo by Brooks Leibee)

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The wonders of the deep - Light only penetrates about 200 m (656 ft) into the ocean (but illuminates for several more meters).

(Photo by Wynand Uys)

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The wonders of the deep - After 1,000 m (3,280 ft), the oceans are completely dark.

(Photo by guille pozzi)

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The wonders of the deep -

After 10 m (32.8 ft), divers can't see red. After 30 m (98.4 ft), they can't see yellow.

(Photo by Miguel Machado)

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The wonders of the deep - The point in the ocean most remote from land is called Point Nemo. 

(Photo by Kris Mikael Krister)

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The wonders of the deep - Point Nemo is located 2,688 km (1,670 mi) from the nearest islands in the South Pacific Ocean.

(Photo by yang miao)

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The wonders of the deep - We might not think of the seas when we think travel, but more than 90% of goods traded between countries are transported by sea. 

(Photo by Mords Saligumba)

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The wonders of the deep - It takes water 1,000 years to complete a continuous journey around the globe.

(Photo by Tavis Beck)

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The wonders of the deep - The phenomenon is called global ocean conveyor belt. 

(Photo by Pratik Mehta)

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The wonders of the deep - Scuba diving is safer than driving, skydiving, and marathon running.

(Photo by Karen Cantú Q)

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The wonders of the deep - The Great Barrier Reef in Australia can be seen from the moon.

(Photo by Willian Justen de Vasconcellos)

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The wonders of the deep - 10 m (33 ft) of ocean depth has the same mass as the atmosphere. 

(Photo by Daniel Corneschi)

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The wonders of the deep - Half the oxygen we breathe day in and day out is produced by the oceans. 

(Photo by David Clode)

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The wonders of the deep - The waters of every ocean contains dissolved gold. But don't get your hopes up. It amounts to very little. 

(Photo by Anton Darius | @theSollers)

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The wonders of the deep - Just 2.5 m (8 ft) of ocean depth holds as much water as the atmosphere. 

(Photo by Anastasia Dulgier)

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The wonders of the deep - The ocean holds 50 times more carbon dioxide than the atmosphere. 

(Photo by Alexandra Rose)

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The wonders of the deep - The ocean is home to 28 major groups of animals versus 11 that live on land.

(Photo by Anton Darius | @theSollers)

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The wonders of the deep - A number of species that live at the bottom of the ocean, known as abyssal creatures, can glow in the dark through chemical reactions.

(Photo by Robert Metz)

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The wonders of the deep - The average gray whale migrates about 16,000 km (10,000 mi) each year, the longest migration of any mammal.

(Photo by Jeswin Thomas)

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The wonders of the deep - But one overachiever gray whale traveled 22,511 km (13,988 mi) in 172 days, thus holding the record of the longest known migration of a mammal.

(Photo by Guillaume Bourdages)

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The wonders of the deep - The largest recorded blue whale measured 33 m (108 ft), the height of an 11-story building. 

(Photo by Mohamed Maail)

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The wonders of the deep - Flounder can use its camouflage to hide on a checkerboard. 

(Photo by Shane Stagner)

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The wonders of the deep - Coral reefs cover 20% of the ocean floor. 

(Photo by Milos Prelevic)

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The wonders of the deep - Corals are colonies of tiny animals with porous limestone skeletons.

(Photo by Shane Stagner)

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The wonders of the deep - Some Antarctic species have natural antifreeze in their blood to prevent it from freezing.

(Photo by Francisco Jesús Navarro Hernández)

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The wonders of the deep - Hákarl, a national delicacy of Iceland, is the product of allowing the antifreeze toxins in sharks to rot through fermentation. It's definitely an acquired taste and not for the faint of heart. 

(Photo by Shaun Low)

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The wonders of the deep - Corals reefs house 25% of all marine life, so don't step on them!

(Photo by Ray Aucott)

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The wonders of the deep - Humans have only mapped about 5% of the ocean floor in detail.

(Photo by David Clode)

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The wonders of the deep - The largest underwater cliffs are located in the Bahamas, with sheer drops of up to 4,000 m (13,100 ft).

(Photo by Anthony Rao)

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The wonders of the deep - If we combine the length of all mid-ocean ridges, we'd have enough to circle Earth twice over. 

(Photo by David Clode)

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The wonders of the deep - We know of 230,000 marine species, but more than two million is estimated to exist. We haven't even scratched the surface. 

(Photo by Cristian Palmer)

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The wonders of the deep - The deepest depth currently known, the Mariana Trench in the Pacific Ocean, is 11 km (6.8 mi). Mount Everest is 8.8 km (5.5 mi).

(Photo by Ravi Shekhar)

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The wonders of the deep - The pressure in the Mariana Trench is 8 metric tons, a thousand times the atmospheric pressure at sea level.

(Photo by David Clode)

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The wonders of the deep - The temperature in the Mariana Trench ranges between -1ºC (30ºF) and 4ºC (39ºF).

(Photo by David Clode)

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The wonders of the deep - One of the deepest living fish ever recorded, fittingly dubbed "ghost fish," was found at 8,143 m (26,714 ft).

(Photo by David Clode)

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The wonders of the deep - The record for deepest scuba diving is 332.35 m (1,090 ft), achieved in the Red Sea, Egypt, in 2014.

(Photo by David Clode)

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The wonders of the deep - The record for deepest free diving is 214 m (702 ft) achieved off the coast of Spetses, Greece, 2007.

(Photo by David Clode)

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The wonders of the deep - The world's tallest mountain is actually found in the Pacific Ocean. The Mauna Kea in Hawaii is 10 km (6.8 mi).

(Photo by Mendar Bouchali)

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The wonders of the deep - The world's longest mountain range is found in the ocean. The Mid Oceanic Ridge is 65,000 km (40,300 mi).

(Photo by Cristian Palmer)

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The wonders of the deep - Some species of deep-sea corals can be found at 6,000 m (19,685 ft) in waters as cold as 2ºC (35ºF).

(Photo by Jared Poledna)

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The wonders of the deep - More than half of the global fish catch is done by fishermen and women operating at a small-scale, local level. 

(Photo by Lance Anderson)

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The wonders of the deep - A swallow of seawater may contain millions of bacterial cells, hundreds of thousands of phytoplankton, and tens of thousands of zooplankton. 

(Photo by Jong Marshes)

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The wonders of the deep - About 97% of the planet's habitat space is found in the waters. 

(Photo by Patrick Brinksma)

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The wonders of the deep -

The sea is a mega museum, holding more artifacts and remnants of history than all of the world’s museums combined.

(Photo by Vlad Tchompalov)

See also:  60 astonishing pictures of the Milky Way.

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