Underwater grasses in the Susquehanna Flats, which has seen considerable submerged aquatic vegetation growth in recent years. Maryland Department of Natural Resources photo. ANNAPOLIS, Md. – Across the Chesapeake Bay and its tributaries, below the water’s surface, ribbons of green sway in the current. They are stems of pondweed, eelgrass, widgeon grass, stargrass, and a…
