The deep ocean refers to the part of the ocean that is below 1,000 meters (3,280 feet) and extends to the ocean floor. This region is characterized by high pressure, low temperatures, and complete darkness. It is home to unique ecosystems and organisms that have adapted to extreme conditions, such as deep-sea fish, giant squids, and bioluminescent creatures. The deep ocean covers about 65% of the Earth's surface and plays a crucial role in regulating the planet's climate. It also serves as a habitat for many species and is a source of valuable resources, including minerals and hydrothermal vents. Scientists continue to explore this mysterious environment to better understand its significance.