eelgrass

noun ! Definition from Wiktionary (CC BY-SA). More about eelgrass at Wordnik → Where our words come from →

1. Any of several species of aquatic plant, with very long and narrow leaves Zostera spp. in marine environments especially Zostera marina, growing abundantly in shallow bays along the coasts of the Northern Hemisphere. Vallisneria spp. in freshwater environments.
2. Zostera spp. in marine environments especially Zostera marina, growing abundantly in shallow bays along the coasts of the Northern Hemisphere.
3. especially Zostera marina, growing abundantly in shallow bays along the coasts of the Northern Hemisphere.