Region
Atlantic Coast (U.S.)
36
United States
24
Pacific Coast (U.S.)
22
California
16
Florida
13
Gulf Coast (U.S.)
9
Great Plains
5
Northeastern States
5
Pacific Coast
5
Alaska
4
Colorado
4
Mexico, Gulf of
4
South Atlantic Bight
4
Wyoming
4
South Atlantic States
3
Adirondack Mountains Region
2
Atlantic States
2
California, Southern
2
Canada
2
Columbia River
2
Islands of the Pacific
2
Massachusetts
2
Mexico
2
Mid-Atlantic Bight
2
Middle Atlantic States
2
Middle West
2
Minnesota
2
Mississippi River
2
Montana
2
Nevada
2
New Mexico
2
New York (State)
2
North America
2
Pennsylvania
2
Prairie Pothole Region
2
Saint Clair, Lake (Mich. and Ont.)
2
Saint Marys River (Mich. and Ont.)
2
South Dakota
2
Southern States
2
Texas
2
Washington (State)
2
Arizona
1
Atlantic Coast (United States and Canada)
1
Atlantic Ocean
1
Barataria Bay
1
Beadle County
1
Blue Ridge Mountains
1
Caribbean Area
1
Colorado River Watershed (Colo.-Mexico)
1
Connecticut
1
more ...