Submerged aquatic vegetation (SAV) refers to plants that grow underwater in freshwater and saltwater environments. These plants, which include species like eelgrass and pondweed, play a crucial role in aquatic ecosystems by providing habitat and food for various organisms, including fish and invertebrates. SAV also helps improve water quality by absorbing nutrients and stabilizing sediments. Additionally, these plants produce oxygen through photosynthesis, which is essential for the survival of many aquatic species. Overall, submerged aquatic vegetation is vital for maintaining healthy water bodies and supporting biodiversity.