adjective of or relating to the region of the continental shelf (between the seashore and the edge of the continental shelf) or the marine organisms situated there Found on https://www.encyclo.co.uk/local/20974
of or pertaining to the biogeographic region of the ocean bottom between the littoral and bathyal zones, from the low water line to the edge of the continental shelf, or to a depth of approximately 660 ft. (200 m). · being or situated in the zone of a lake extending from the lowest depth of rooted photosynthetic plants to the level at which... Found on https://www.infoplease.com/dictionary/sublittoral