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The mesopelagic zone (Greek μέσον, middle), also known as the middle pelagic or twilight zone, is the part of the pelagic zone that lies between the photic epipelagic and the aphotic bathypelagic zones. [1]
H. heteropsis is generally found at ocean depths of 200–1000 meters (0.12–0.62 miles), which is considered part of the ocean's mesopelagic, or twilight, zone. [3] The species undergoes diurnal vertical migration, where they are found at lower depths during the day and migrate up the water column at night. [11]
The mesopelagic zone is the disphotic zone, meaning light there is minimal but still measurable. The oxygen minimum layer exists somewhere between a depth of 700 metres (2,297 ft) and 1,000 metres (3,281 ft) deep depending on the place in the ocean. This area is also where nutrients are most abundant.
At night, like many other animals that live in the twilight zone, it migrates to more shallow waters in search of food. Each night it reaches the upper layer of the ocean, or sunlight zone where ...
The mesopelagic zone is the upper section of the midwater zone, and extends from 200 to 1,000 metres (660 to 3,280 ft) below sea level. This is colloquially known as the "twilight zone" as light can still penetrate this layer, but it is too low to support photosynthesis.
The Twilight Zone creator and screenwriter Rod Serling would celebrate his 100th birthday on Dec. 25, 2024. Rod's daughter, Anne Serling, and TV writer, Marc Scott Zicree, each published books ...
All species in the genus Cyclothone live in the midwater range of the deep sea, and are most commonly found in the mesopelagic zone at 300–1500 meters depth (roughly 1,000-5,000 feet). [7] The deep sea is an extreme habitat, and life in the deep ocean has specialized adaptations to survive.
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