Maryland’s Department of Natural Resources said its 2021-2025 review found the highest averages in decades for oyster reproduction, habitat availability and overall biomass, alongside low levels of disease and mortality.
Of the state’s 51 oyster sanctuaries, 33 were restored, trending positively or undergoing restoration. Four were underperforming and being evaluated for corrective action; other sites were set aside for research or had too little data for assessment.
Most sampled areas open to public fishing also saw increases in oyster density and biomass compared with earlier five-year periods. A 2024 state assessment found oyster populations in Maryland waters had more than tripled between 2005 and 2023.
Oysters form reefs that provide habitat for other aquatic life and help filter water. The state’s report describes progress while making clear that restoration and monitoring are continuing.
