|Eelgrass (Zostera marina) at low tide|
|Closeup of eelgrass blades|
Unfortunately, eelgrass and other seagrass beds are at risk due to a number of factors. Boat propellers and dredging operations will destroy beds directly. In contrast, runoff from land can lead to increased turbidity that can shade out beds. Also, this runoff can bring excess nutrients and lead to heavy algae growth, which will also shade out beds. The damaging and loss of beds had led to decreases in fish populations, though the exact amount of loss can't really be determined. Though these concerns do exist and eelgrass populations are decreasing, they are still considered to be of Least Concern by the IUCN.
Sources are the Maryland Department of Natural Resources, University of Delaware, Washington State Department of Ecology, and IUCN Red List. Images are from Wikimedia Commons and are under Creative Commons licenses or are copyright free: one, two, three.