Subregions- Aguascalientes, Mexico
 - Aguascalientes urban area, Aguascalientes, Mexico
 - Akron urban area, Ohio
 - Alabama
 - Albuquerque urban area, New Mexico
 - Anticosti Island, Quebec, Canada
 - Arkansas
 - Bahama Islands
 - Barnegat Bay, New Jersey
 - Bass Islands, Ohio
 - Bay of Campeche
 - Birmingham urban area, Alabama
 - central Texas
 - Chesapeake Bay region
 - Chihuahua, Mexico
 - Chihuahua urban area, Chihuahua, Mexico
 - Cincinnati urban area, Kentucky
 - Cincinnati urban area, Ohio
 - Ciudad Juarez urban area, Chihuahua, Mexico
 - Cleveland urban area, Ohio
 - Coahuila, Mexico
 - Colorado
 - Colorado Springs urban area, Colorado
 - Columbus urban area, Ohio
 - Culiacan urban area, Sinaloa, Mexico
 - Dauphin Island, Alabama
 - Davis Strait
 - Dayton urban area, Ohio
 - Delaware
 - Delaware Bay, Delaware
 - Delaware Bay, New Jersey
 - Delaware River, Delaware
 - Denver urban area, Colorado
 - Distrito Federal, Mexico
 - Durango, Mexico
 - eastern Kentucky
 - eastern Montana
 - eastern Quebec, Canada
 - eastern Tennessee
 - eastern Texas
 - El Paso urban area, New Mexico
 - Estado de Mexico, Mexico
 - Florida-Georgia border region
 - Florida Peninsula
 - Gaspe Peninsula, Quebec, Canada
 - Georgia, USA
 - Great Bay, New Jersey
 - Great Egg Harbor Bay, New Jersey
 - Greater New York area, New Jersey
 - Greater Philadelphia area, New Jersey
 - Greater Philadelphia area, Pennsylvania
 - Guadalajara urban area, Jalisco, Mexico
 - Guanajuato, Mexico
 - Gulf of Maine
 - Gulf of Mexico
 - Gulf of St. Lawrence
 - Harrisburg urban area, Pennsylvania
 - Hidalgo, Mexico
 - Hudson Bay
 - Hudson Bay Islands, Nunavut, Canada
 - Hudson Strait region, Canada
 - Illinois
 - Indiana
 - Indian River Bay, Delaware
 - Iowa
 - Isla del Carmen, Campeche, Mexico
 - Jalisco, Mexico
 - James Bay, Nunavut, Canada
 - Kansas
 - Kelleys Island, Ohio
 - Labrador, Newfoundland and Labrador, Canada
 - Labrador Sea
 - Laguna de Terminos, Campeche, Mexico
 - Lake Erie, Ohio
 - Lake Erie, Pennsylvania
 - Lake Michigan, Illinois
 - Lake Michigan, Indiana
 - Lehigh Valley urban area, New Jersey
 - Lehigh Valley urban area, Pennsylvania
 - Leon urban area, Guanajuato, Mexico
 - Little Egg Harbor, New Jersy
 - Long Beach Island, New Jersey
 - Louisiana
 - Louisiana-Texas border region
 - Lower Bay, New Jersey
 - Maine
 - Manitoba, Canada
 - Maryland
 - Massachusetts
 - Michigan
 - Minnesota
 - Mississippi
 - Mississippi Sound, Alabama
 - Missouri
 - Mobile Bay, Alabama
 - Monterrey urban area, Nuevo Leon, Mexico
 - Nayarit, Mexico
 - near the coast of Massachusetts
 - Nebraska
 - New Brunswick, Canada
 - Newfoundland, Newfoundland and Labrador, Canada
 - New Hampshire
 - New Jersey
 - New Mexico
 - New York
 - New York-Massachusetts border region
 - North Carolina
 - North Dakota
 - northern Quebec, Canada
 - northern Texas
 - Nova Scotia, Canada
 - Nuevo Leon, Mexico
 - offshore Campeche, Mexico
 - offshore Delaware
 - offshore Maryland
 - offshore New Hampshire
 - offshore New Jersey
 - offshore Tabasco, Mexico
 - offshore Tamaulipas, Mexico
 - offshore Veracruz, Mexico
 - off the east coast of the United States
 - Ohio
 - Oklahoma
 - Oklahoma City urban area, Oklahoma
 - Ontario, Canada
 - Ontario-Quebec border region, Canada
 - Pennsylvania
 - Perdido Bay, Alabama
 - Pittsburgh urban area, Pennsylvania
 - Potomac-Shenandoah region
 - Prince Edward Island, Canada
 - Puebla, Mexico
 - Puebla urban area, Puebla, Mexico
 - Quebec-New Brunswick border region, Canada
 - Queretaro, Mexico
 - Queretaro urban area, Queretaro, Mexico
 - Raritan Bay, New Jersey
 - Rehoboth Bay, Delaware
 - Saguenay Valley region, Quebec, Canada
 - Saltillo urban area, Coahuila, Mexico
 - Sandy Hook Bay, New Jersey
 - San Luis Potosi, Mexico
 - San Luis Potosi urban area, San Luis Potosi, Mexico
 - Saskatchewan, Canada
 - Scranton-Wilkes-Barre urban area, Pennsylvania
 - Sinaloa, Mexico
 - South Carolina
 - South Dakota
 - southern New England
 - southern Ontario, Canada
 - southern Quebec, Canada
 - southern Texas
 - St. Lawrence Valley region, Quebec, Canada
 - Tamaulipas, Mexico
 - Tennessee
 - Texas-Mexico border region
 - Texas Panhandle region
 - Tlaxcala, Mexico
 - Toledo urban area, Ohio
 - Torreon urban area, Coahuila, Mexico
 - Torreon urban area, Durango, Mexico
 - Trenton urban area, New Jersey
 - Tulsa urban area, Oklahoma
 - Turks and Caicos Islands region
 - Ungava Bay, Canada
 - Ungava Peninsula, Quebec, Canada
 - Utah
 - Veracruz, Mexico
 - Vermont
 - Vermont - New Hampshire region
 - Virginia
 - Virginia-North Carolina border region
 - Wasatch Front Urban Corridor, Utah
 - western Florida
 - western Kentucky
 - western Montana
 - western Texas
 - West Virginia
 - Wilmington urban area, Delaware
 - Wisconsin
 - Wyoming
 - Yellowstone National Park, Idaho
 - Yellowstone National Park, Montana
 - Yellowstone National Park, Wyoming
 - Youngstown-Akron urban area, Ohio
 - Zacatecas, Mexico

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