Subterranean communities refer to ecosystems that exist below the Earth's surface, primarily in caves, underground rivers, and soil. These environments host a variety of organisms, including bacteria, fungi, and specialized animals like blind cave fish and troglobites, which have adapted to life without sunlight. The unique conditions of these habitats create distinct ecological interactions and nutrient cycles. These communities play a crucial role in the overall health of the environment. They contribute to soil formation, nutrient recycling, and groundwater purification. Additionally, subterranean ecosystems are important for scientific research, offering insights into evolution and biodiversity, as well as potential applications in medicine and technology.