The Chesapeake Bay’s blue crab population increased significantly in 2026, according to the annual winter dredge survey conducted by the Maryland Department of Natural Resources and the Virginia Institute of Marine Science.
The survey estimates a total of 349 million blue crabs in the Bay, a 46% increase from the 238 million crabs estimated last year. Juvenile blue crabs saw an even larger jump, with an estimated 228 million juveniles — a 121% increase from 2025. Both the total abundance and juvenile abundance reached their highest levels since 2019.
Adult male crabs also increased, with an estimated 37 million adult males in the Bay, up 43% from last year. However, the number of adult female crabs declined by 25% to 81 million. While this number remains above the overfished threshold, it is below the target level used in fisheries management.
“This is very encouraging to see higher levels of blue crabs and juveniles, especially after a few years of lower juvenile recruitment,” said Mandy Bromilow, DNR’s blue crab program manager. “However, we’ll still have to remain vigilant about the population, given that we have seen declines since 2011.”
The survey also found higher-than-average overwintering mortality due to the cold winter. About 20% of adult male crabs and 12% of adult female crabs died over the winter, compared to long-term averages of 9% and 7%, respectively. Despite this, the overall population showed improvement.
The Chesapeake Bay Foundation noted that while the increase in juveniles and adult males is positive, the continued decline in adult females remains a concern. Adult females are critical to rebuilding the population because they produce millions of eggs each spawning season.
CBF Virginia Executive Director Chris Moore said the results offer a promising sign for the upcoming crabbing season but emphasized the need for continued focus on pollution reduction, habitat restoration, and addressing threats such as blue catfish.
Scientists are currently finalizing a new benchmark stock assessment for Chesapeake Bay blue crabs. The draft assessment indicates that while there are more crabs than previously estimated, the population has been in decline since 2011 without a clear single cause. Over the next year, Maryland and Virginia will work with watermen, scientists, and other partners to incorporate the assessment findings into management decisions.
The winter dredge survey, conducted annually since 1990, samples blue crabs at 1,500 sites throughout the Bay from December through March. The results help guide management decisions across Maryland and Virginia.
