which ocean zone is the biggest
By Jennifer Kennedy. Pelagic Zone Background: The open ocean, or pelagic zone, is the area of the ocean outside of coastal areas, and where youâll find some of the biggest marine life species. The sea floor (demersal zone) is not included in the pelagic zone.Different Zones in the Open Ocean:y Jennifer Kennedy. Pelagic Zone Background: The open ocean, or pelagic zone, is the area of the ocean outside of coastal areas, and where youâll find some of the biggest marine life species. The sea floor (demersal zone) is not included in the pelagic zone. Different Zones in the Open Ocean: