Ocean Zones and Animals Who Live There | Ocean Worlds
The discovery of tube worms in 1977 lead to thThe Trenches, also known as the Hadalpelagic or Hadal zone, are the deepest parts of the ocean. It is from 6000m (19,686 ft) below sea level to the bottom of the ocean. A trench is a narrow, elongate, v-shaped cavity in the ocean floor. Trenches are the deepest parts of the earth and ocean.
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