They may tolerate or require various concentrations of salt. 7 - 35 Found in cold waters. The Ecology of Atlantic Shorelines. Sinauer Associates, Inc., Sunderland, Massachusetts.
Seagrass provides a refuge from predation.
The roots and rhizmome mat protects various Polychaete worms, amphipods, clams from predators. Live on surface of blades and sediment and receive refuge among the shoots and leaves. Godfrey, R. K. and J. Wooten. Aquatic and Wetland Plants of Southeastern United States . University of Georgia Press.