AI Insight
Submerged aquatic vegetation in the Chesapeake Bay increased by 7% in 2025, according to research from William & Mary's Virginia Institute of Marine Science and Batten School. These underwater grasses are considered a critical indicator of the bay's overall ecosystem health. The growth was primarily driven by increases in the saltier waters of the bay.
Why it matters
Submerged aquatic vegetation provides essential habitat for fish and crabs, improves water quality by filtering pollutants, and stabilizes sediments. An increase in these underwater grasses suggests improving environmental conditions in portions of the Chesapeake Bay, which is one of the most important estuaries in the United States.
Understand the Science
Submerged aquatic vegetation (SAV), one of the Chesapeake Bay’s most important indicators of ecosystem health, increased by 7% in 2025, according to researchers at William & Mary’s VIMS & Batten School.
Source: Chesapeake Bay underwater grasses increase 7%, buoyed by gains in salty waters