The benthic zone is the lowest level of a body of water, such as an ocean or a lake. It is inhabited mostly by organisms that tolerate cool temperatures and low oxygen levels, called benthos or benthic organisms. The profundal, limnetic, and littoral zones can be found above the benthic zone. No light other than bioluminescence is found in the benthic zone; it is part of the aphotic zone. A body of water is any significant natural pool of water such as an ocean, a lake, or a river, covering the Earth or another planet. ... [[Image:http://www. ... A lake is a body of water surrounded by land. ... Temperature is also the name of a song by Sean Paul. ... General Name, Symbol, Number oxygen, O, 8 Chemical series Nonmetals, chalcogens Group, Period, Block 16, 2, p Appearance colorless Atomic mass 15. ... In oceanography, marine geology and biology, benthos are the organisms and habitats of the sea floor; in freshwater biology they are the organisms and habitats of the bottoms of lakes, rivers, and creeks. ... The profundal zone is a deep zone of a body of water, such as an ocean or a lake, located below the range of effective light penetration. ... A littoral is the region near the shoreline of a body of fresh or salt water. ... Bioluminescence is the production and emission of light by a living organism as the result of a chemical reaction during which chemical energy is converted to light energy. ... The aphotic zone is the depth of the ocean that is not exposed to sunlight. ...