The Euphotic Zone is the upper layer of a body of water where sunlight penetrates, allowing photosynthesis to occur. This zone typically extends to about 200 meters deep in oceans, depending on water clarity. It is crucial for marine life, as it supports the growth of phytoplankton, which forms the base of the aquatic food web. In the Euphotic Zone, light availability decreases with depth, leading to distinct ecological zones. Below this layer lies the Dysphotic Zone, where light is insufficient for photosynthesis. The health of the Euphotic Zone is vital for ecosystems and is influenced by factors such as water temperature and nutrient availability.