Eelgrass is a type of underwater plant found in shallow coastal waters, primarily in temperate regions. It plays a crucial role in marine ecosystems by providing habitat and food for various species, including fish and invertebrates. Eelgrass beds also help stabilize sediments and improve water quality by absorbing nutrients. This plant has long, ribbon-like leaves that can grow up to a meter in length. Eelgrass is important for marine biodiversity and is often used in habitat restoration projects. Its decline due to factors like pollution and climate change poses a threat to the health of coastal environments.