Text Size: A  A  A

Discover the Chesapeake

The Chesapeake Bay - the largest estuary in the United States - is an incredibly complex ecosystem that includes important habitats and food webs. The Bay and its rivers, wetlands and forests provide homes, food and protection for diverse groups of animals and plants. Fish of all types and sizes either live in the Bay and its tributaries year-round or visit its waters as they migrate along the East Coast.

Bay 101

Select a category below to view videos from our Bay Program video library. Prior to using any of these videos, please view our terms of use to learn about usage rights.


Bay 101: Fish Food

Find out what larger fish like striped bass and bluefish eat to survive in the Chesapeake Bay

The Chesapeake Bay Watershed

A watershed is an area of land that drains to a particular river, lake, bay or other body of water. Watersheds are sometimes called “basins” or "drainage basins."

We all live in a watershed. Some watersheds, like that of your local stream or creek, are small. Others, like the Chesapeake Bay watershed, are very large. Learn more about the Chesapeake Bay watershed.

The Bay Ecosystem

An ecosystem is a complex set of relationships among living and non-living things. Air, water, soil, sunlight, plants and animals – including humans – make up an ecosystem. Ecosystems can be as tiny as a patch of dirt in your backyard, or as large as the entire Chesapeake Bay watershed.

The Bay Ecosystem

The Chesapeake Bay, the largest estuary in the United States, is an extremely productive and complex ecosystem. The Bay ecosystem consists of the Bay itself, its local rivers and streams, and all the plants and animals it supports. Learn more about the Chesapeake Bay ecosystem.

Critter Of The Month

Atlantic Silverside
Menidia menidia

The Atlantic silverside is a small forage fish with a silver band along either side of its body. It can be found in schools in the Bay, and is an important part of many larger fishes’ diets.

Chesapeake History

2014

2014
  • The Chesapeake Executive Council signs the Chesapeake Bay Watershed Agreement, which contains goals and outcomes that will guide conservation and restoration across the watershed. For the first time, the Bay’s headwater states commit to those goals that reach beyond water quality.

2013

2013
  • A federal judge rules that the U.S. Environmental Protection Agency can set pollution limits for the Chesapeake Bay, thus upholding the Total Maximum Daily Load (TMDL) that was challenged in court in 2011.

2012

2012
  • Harris Creek becomes the first target of the oyster restoration goals set forth in the Chesapeake Bay Executive Order: to restore oyster populations in 20 Bay tributaries by 2025. In this Choptank River tributary, existing reefs will be studied, new bars will be built and spat-on-shell will be planted.

2011

2011
  • The U.S. Environmental Protection Agency issues a new Municipal Separate Storm Sewer Permit to the District of Columbia. It is the first of its kind to incorporate green infrastructure into its requirements, setting a national model for stormwater management.

2010

2010
  • Maryland, Virginia and New York ban phosphates in dishwasher detergent to lower phosphorous pollution in local waterways.
  • The U.S. Environmental Protection Agency establishes the Total Maximum Daily Load to limit the amount of pollutants that can enter the Chesapeake Bay.
  • The Bay Program launches ChesapeakeStat to improve communication about restoration goals, progress and funding.

Bay FAQ


What is the ideal salinity for eastern oysters?


What is the Chesapeake Bay's average salinity?


What is a subwatershed?


What is a crab jubilee?


How does groundwater become polluted?


What is ocean acidification?


How do you measure dissolved oxygen?


What is the difference between epifauna and infauna?


What are forest buffers?


Why are estuaries important?

See more FAQs.

Bay Glossary

Atmospheric deposition

The process by which airborne pollutants settle onto land or water. “Wet deposition” refers to pollutants that fall to the earth while attached to raindrops or snowflakes. “Dry deposition” refers to pollutants that fall to the earth without precipitation.

Exotic species

Any introduced plant or animal species that is not native to a region. Exotic species are not always considered a nuisance or invasive.

Phytoplankton

Tiny, single-celled planktonic plants. Also called algae. Phytoplankton are the primary producers of food and oxygen in the Bay food web.

Use attainability analysis (UAA)

A structured scientific assessment of the factors affecting attainment of the designated use component of water quality standards, based on physical, chemical, biological and/or economic factors.

Pharmaceuticals

Compounds manufactured for use as medicinal drugs.

Bivalve

An aquatic mollusk whose compressed body is enclosed within a hinged shell. For example, clams, oysters and mussels are bivalves.

Emissions

Pollution released or discharged into the air from natural or man-made sources, including vehicles, smokestacks and the spraying of aerosols.

Young of the year (YOY)

All of the fish of a species that were born in the past year, from transformation to juvenile until January 1.

See more bay terms.

410 Severn Avenue / Suite 112
Annapolis, Maryland 21403
Tel: (800) YOUR-BAY / Fax: (410) 267-5777
Directions to the Bay Program Office
Terms of Use | Privacy Policy
©2012 Chesapeake Bay Program | All Rights Reserved