A 445 million year old critter continues to visit the Bay
July 20, 2026The horseshoe crab uses a variety of adaptations to survive
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Our regional partnership guides the restoration and protection of the nation’s largest estuary.
Learn more about usThe horseshoe crab uses a variety of adaptations to survive
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Frederick Douglass visited the creek as a child
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New technology mimics coral reef nutrient removal
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Our partnership is guided by the Chesapeake Bay Watershed Agreement: a collaborative commitment to restore, conserve and protect the Bay, its tributaries and the lands that surround them.
Learn more about the latest agreementThousands of creeks, streams and rivers deliver fresh water to the Bay from a region that spans 64,000 square miles.
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A balanced food web supports a productive ecosystem, as energy flows from the Bay's plants to its predators.
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Complex problems face the Bay, its watershed and the plants, animals and people that live here.
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From trivia about its geography to facts about its flora and fauna, the Bay has a lot to teach us.
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Explore the Field Guide to learn about more than 300 species of birds, fish, insects, invertebrates, mammals, plants, reptiles and amphibians that live in the Chesapeake Bay region.
Visit the field guideThe James spinymussel is a rare freshwater mussel found in a handful of streams and rivers in Virginia, West Virginia and North Carolina. One of only a few freshwater mussel species with spines, it serves as an important filter feeder that helps improve water quality in river ecosystems.
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