Genus Zostera, also known as eelgrass, is a group of aquatic plants that form an important component of marine ecosystems around the world. There are several synonyms used to refer to Genus Zostera, depending on the geographical location and the specific species in question. In Europe, the plant is commonly called seagrass, while in North America it is known as saltmarsh cordgrass. Other synonyms for Genus Zostera include Heterozostera, Nanozostera, and Phyllospadix. Regardless of the name used, eelgrass plays a crucial role in providing habitat and food for marine animals, and is under threat due to marine pollution, climate change, and human activities.