Water temperature drops rapidly between the euphotic zone and the abyssal zone of the ocean. This phenomenon is called the

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The rapid drop in water temperature between the euphotic zone (uppermost layer of the ocean) and the abyssal zone (deepest layer of the ocean) is known as the thermocline. The thermocline is a distinct layer where the temperature gradient changes rapidly, with temperatures dropping from warm surface waters to cold deep waters.

Water Temperature Drops Rapidly Between the Euphotic Zone and the Abyssal