Question: what are the three vertical zones of the ocean?
Answer: As your submarine continues to descend, you will go through three more vertical layers of ocean, differentiated by temperature and pressure thresholds: the bathypelagic zone, between 3,280 and 13,000 feet below the surface, the abyssopelagic zone between 13,000 and 20,000 feet below the surface; and the hadal zone, ...