Deep sea
Deep Sea
The Deep Sea (pronunciation: /di:p si:/) is a term used to describe the deepest parts of the ocean, typically those areas that are below 200 meters (656 feet) in depth.
Etymology
The term "Deep Sea" is derived from the Old English words "deop" (deep) and "sæ" (sea). It has been used in English since the late 14th century to refer to the deepest parts of the ocean.
Definition
The Deep Sea is characterized by its extreme conditions, including high pressures, low temperatures, and lack of sunlight. Despite these harsh conditions, a variety of organisms have adapted to live in the Deep Sea, including certain species of fish, crustaceans, and mollusks.
Related Terms
- Bathypelagic Zone: This is the layer of the ocean that lies between 1000 and 4000 meters (3281 and 13123 feet) in depth. It is also known as the "midnight zone" due to the lack of sunlight.
- Abyssopelagic Zone: This is the layer of the ocean that lies between 4000 and 6000 meters (13123 and 19685 feet) in depth. It is characterized by its extreme conditions, including high pressures and low temperatures.
- Hadalpelagic Zone: This is the deepest layer of the ocean, lying below 6000 meters (19685 feet) in depth. It includes the ocean's deepest trenches.
- Hydrothermal Vents: These are openings in the seafloor where heated, mineral-rich water is released. They are often found in the Deep Sea and support a diverse array of life.
- Bioluminescence: This is the production and emission of light by a living organism. Many Deep Sea creatures use bioluminescence to communicate, find food, and deter predators.
External links
- Medical encyclopedia article on Deep sea
- Wikipedia's article - Deep sea
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