Answer:

eelgrass

Answer	Crossword Clue
EELGRASS	Tidewater plant used in packing glass
EELGRASS	Coarse shoreline verdure.
EELGRASS	Submerged marine plant

EELGRASS	Underwater plant
EELGRASS	Morays don't grow on this
EELGRASS	Ribbonlike marine plant
EELGRASS	Plant with long ribbonlike leaves
EELGRASS	Freshwater plant also called wild celery
EELGRASS	Marine plant that morays love?