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Hydrothermal vents are fissures on the ocean floor that release geothermally heated water. They are formed when seawater seeps into the oceanic crust near mid-ocean ridges, where tectonic plates are spreading apart. The water becomes superheated by magma chambers below and rises back to the surface through cracks in the crust, often accompanied by mineral-rich deposits that create unique underwater geological formations. Hydrothermal vents support a diverse ecosystem of organisms adapted to extreme conditions, including giant tube worms, extremophile bacteria, and various types of mollusks. These vent communities are not dependent on sunlight for energy, instead relying on chemosynthesis, the process by which organisms convert chemical energy into organic matter. As a result, hydrothermal vents represent one of the most remarkable natural wonders in the deep sea and provide valuable insights into the adaptability of life in extreme environments.