Süvaveekogud
Süvaveekogud are deep bodies of water, typically referring to lakes and oceans that extend significantly below the surface. In the context of lakes, süvaveekogud represent the profundal zone, the deepest part of a lake where sunlight cannot penetrate. This region is characterized by perpetual darkness, low temperatures, and often high pressure. Organisms living in süvaveekogud have adapted to these extreme conditions, relying on chemosynthesis or organic matter that sinks from the upper layers for sustenance.
In marine environments, the term süvaveekogud encompasses the bathyal, abyssal, and hadal zones of the ocean.