While the average depth of the ocean is around 12,100 feet (3,700 meters), there is a point known as Challenger Deep in the Mariana Trench which is...

The photic zone is the top layer of the ocean where light still penetrates. This zone is also called the epipelagic or sunlight zone.

The disphotic zone also called the mesopelagic or twilight zone is the second layer of the ocean where only a small amount of light comes through....

The aphotic zone consists of three sublevels and it’s these parts of the ocean that no light gets through. It’s made up of the bathyal zone, the ab...

The Pacific Ocean is the largest ocean in the world with a surface area of more than 62 million square miles. It’s also pretty deep, with an averag...