Open-ocean zone is the part of the ocean that extends beyond the edge of the continental shelf. Continental shelf is a shallow area of the ocean floor extending outward from land.
The open-ocean zone is divided into the surface zone, the transition zone, and the deep zone.
Intertidal zone is the part of the ocean that extends from the high-tide line to the low-tide line, while the neritic zone is the part of the ocean that extends from the low-tide line to the edge of the continental shelf.
