Synonyms for Eelgrass:

n.

eelgrass (noun)
tape grass, sea wrack, wild celery, Vallisneria Spiralis, grass wrack, Zostera Marina.
plant (noun)
sea wrack, Zostera Marina, grass wrack.

Other synonyms:

Vallisneria spiralis
Vallisneria Spiralis.
Zostera marina
Zostera Marina.