The term "Marine Depths" refers to the various layers of the ocean, which can reach depths of over 36,000 feet in places like the Mariana Trench. These depths are characterized by extreme pressure, low temperatures, and complete darkness, creating a unique environment for marine life. Different zones exist within the marine depths, including the epipelagic zone (sunlit surface layer) and the abyssal zone (deep ocean floor). Each zone hosts distinct ecosystems and species, such as anglerfish and giant squid, adapted to survive in their specific conditions. Understanding these depths is crucial for marine biology and oceanography.