sea bottom

1. The bottom of a sea or ocean (synset 109399438)
   is a type of: bed, bottom - a depression forming the ground under a body of water
   subtypes:

   • abyssal zone - the deep sea (2000 meters or more) where there is no light
   • continental shelf - the relatively shallow (up to 200 meters) seabed surrounding a continent
   • bathyal district, bathyal zone, continental slope - the steep descent of the seabed from the continental shelf to the abyssal zone
   • neritic zone - the ocean waters from the low tide mark to a depth of about 100 fathoms
   • twilight zone - the lowest level of the ocean to which light can reach
   same as: davy jones, davy jones's locker, ocean bottom, ocean floor, sea floor, seabed

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