Place
- Cape Cod Bay (Mass.)32
- Cuba32
- China31
- Jasper Ridge Biological Preserve (Calif.)31
- Massachusetts Bay (Mass.)30
- United States. Virgin Islands30
- Egypt29
- Stanislaus County (Calif.)29
- Tulare County (Calif.)29
- Europe26
- Drakes Bay (Calif.)25
- Rhode Island Sound (Mass. and R.I.)25
- Merced County (Calif.)24
- Vietnam24
- Buzzards Bay (Mass. : Bay)23
- Penobscot Bay (Me.)23
- Rocky Mountains23
- Uganda23
- Jordan22
- Nepal22