What is "zostera marina"

Zostera \Zos"te*ra\, n. [NL.] (Bot.) A genus of plants of the Naiadace[ae], or Pondweed family. Zostera marina is commonly known as sea wrack, and eelgrass.

Eelgrass \Eel"grass`\, n. (Bot.) A plant ( Zostera marina), with very long and narrow leaves, growing abundantly in shallow bays along the North Atlantic coast.

Zostera marina is a species of seagrass known by the common names common eelgrass and seawrack. It is an aquatic plant native to marine environments on the coastlines of mostly northern sections of North America and Eurasia.