deep sea

38 Moby Thesaurus words for "deep sea":
      Bassalian, abyssal, aquatic, balneal, bathyal, bathybic,
      bathymetric, bathyorographical, bathypelagic, bathysmal, benthal,
      benthonic, benthopelagic, blue-water, deep-water, estuarine,
      grallatorial, hydrographic, littoral, marine, maritime, natant,
      natatorial, natatory, nautical, oceanic, oceanographic, pelagic,
      seashore, shore, swimming, terriginous, thalassic, tidal,
      water-dwelling, water-growing, water-living, water-loving