Photo Credit: NASA Oxygen-starved ocean “dead zones,” where fish and animals cannot survive, have been expanding in the open ocean and coastal waters for several decades as a result of human ...

Just 6 kilometers (about 4 miles) of briny water separate the ocean's surface from the depths known as the hadal zone. Yet for as much as we know what lurks in its cold darkness, it might as well be ...

The open ocean’s twilight zone, a vast deep ecosystem rich in fish biomass, is poorly understood because it is expensive and challenging for humans to reach its depths 200–1000 meters (660 ...