Definitions for "Bathyal zone"
region of the seafloor from the shelf edge (200m) to the start of the abyssal zone (2,000m).
also called continental slope, the area extending from the edge of the continental shelf and dipping steeply to the abyssal plain (ocean bottom), typically ending at a depth of about 1,100 m.
the steep descent of the seabed from the continental shelf to the abyssal zone