Scientific research submersibles have explored the ocean s deepest trenches but most are designed to reach only the ocean floor.
Deep dark ocean floor.
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Little or no light penetrates this part of the ocean and most of the organisms that live there rely for subsistence on falling organic matter produced in the photic zone for this reason scientists once assumed that life would be sparse.
The deep sea or deep layer is the lowest layer in the ocean existing below the thermocline and above the seabed at a depth of 1000 fathoms 1800 m or more.
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The deep sea is a relatively mysterious and unknown part of the earth as only about 1 of the ocean floor has been explored by humans.
Deep sea exploration has revealed varied landscapes which include volcanoes seamounts hydrothermal vents and cold seeps.
In fact there have been more missions into space than journeys down to the greatest depths of the oceans.
The deep ocean is dark very cold and has tremendous pressure from the overlying water.
Scuba divers can explore only to about 40 meters while most submarines dive only to about 500 meters.
See how these deep sea denizens make the most of their deep dark home.
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But despite their name these plains are not uniformly flat.
Deep sea creatures photos adaptation is the name of the game when you live thousands of feet below the water s surface.