sublittoral

From sub- +‎ littoral.

sublittoral (not comparable)

1. Under the shore.
   • 1966, E. Yale Dawson, Seashore Plants of Southern Califonria, 3rd printing, Berkley: University of California Press, published 1975, →ISBN, →LCCN, page 7:

     Fortunately, good seaweeding can also be done when the tide is not low, for frequently one encounters piles of drifted seaweeds cast up on the sand from the sublittoral region.

• neritic

• marine
• coastal
• littoral
• pelagic

• infralittoral
• circumlittoral
• subtidal

• oceanic
• bathyal, abyssal, hadal
• littoral
• pelagic

sublittoral (plural sublittorals)

1. The area below the shore; the sublittoral region.

“sublittoral”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.