The Midnight Zone: The middle layer is the Midnight Zone. is the part of the pelagic zone that extends from a depth of 1000 to 4000 meters (3300 to 13000 feet) below the ocean surface. It lies between the mesopelagic above, and the abyssopelagic below. This area of the deep sea doesn't get any sunlight. Some of the animals that live here lack eyes. Viperfish, angelfish, snipe eel, and tripod fish can be found in this zone.
The Abyss Zone: The fourth layer is the Abyss Zone. At depths of 4,000 to 6,000 metres (13,123 to 19,685 feet), this zone remains in perpetual darkness and never receives daylight. The abyss is often used to describe the deep sea in general. But the abyss is also a zone far down in the ocean. Most creatures living here lack a backbone, like sea spiders. Other residents include blind shrimp and hagfish.
Squid swimming in the Abyss Zone
The Hadal Zone: The Hadal zone is the final zone. It is the deepest layer. Also known as the hadopelagic zone and trench zone, delineation is the for the deepest trenches in the ocean. This zone is found from a depth of around 6,000 metres (20,000 ft) to the bottom of the ocean. Extreme depths of the this ocean zone are found mostly in deep-water trenches and canyons. Water temperatures are barely above freezing. Still, some life exists her, including sea cucumbers.
Pressure, temperature, and ocean depth: Pressure in the Ocean Pressure increases with ocean depth. Pisces V is a three-person submersible that can operate at depths up to 6,500 feet . This vehicle allows scientists to observe the deep sea under tremendous ocean pressure. At sea level, the air that surrounds us presses down on our bodies at 14.5 pounds per square inch . Temperatures in the oceans Ocean water, with an average salinity of 35 psu, freezes at -1.94 degrees Celsius (28.5 degrees Fahrenheit). That means at high latitudes sea ice can form. The average temperature of the ocean surface waters is about 17 degrees Celsius (62.6 degrees Fahrenheit). Ocean depth The deepest part of the ocean is called the Challenger Deep and is located beneath the western Pacific Ocean in the southern end of the Mariana Trench, which runs several hundred kilometers southwest of the U.S. territorial island of Guam. Challenger Deep is approximately 36,200 feet deep.