Lichen-forming fungi are unique organisms that create a symbiotic relationship with algae or cyanobacteria. This partnership allows them to thrive in harsh environments, such as rocky surfaces and tree bark, where they can absorb moisture and nutrients from the air. The fungi provide structure and protection, while the photosynthetic partners produce food through sunlight. These fungi are essential for ecosystems, as they contribute to soil formation and serve as indicators of environmental health. They can also be used in traditional medicine and as natural dyes. Lichen-forming fungi are found worldwide, showcasing their adaptability and resilience in various habitats.