- eelgrass, grass wrack, sea wrack, Zostera marina - submerged marine plant with very long narrow leaves found in abundance along North Atlantic coasts
--1 is a kind of aquatic plant, water plant, hydrophyte, hydrophytic plant
--1 is a member of Zostera, genus Zostera - sea wrack, wrack - growth of marine vegetation especially of the large forms such as rockweeds and kelp
--2 is a kind of seaweed