Place
- Rhode Island Sound (Mass. and R.I.)3
- Africa2
- Buzzards Bay (Mass. : Bay)2
- Casco Bay (Me.)2
- Central Valley (Calif.)2
- Drakes Bay (Calif.)2
- Hopkins Marine Station2
- Jasper Ridge Biological Preserve (Calif.)2
- Monterey Bay (Calif.)2
- Nantucket Sound (Mass.)2
- Pacific Grove (Calif.)2
- Penobscot Bay (Me.)2
- Placer County (Calif.)2
- Salinas (Calif.)2
- Salinas River Valley (Calif.)2
- San Luis Obispo County (Calif.)2
- Santa Barbara Channel (Calif.)2
- Vineyard Sound (Mass.)2
- Woodside (Calif.)2
- Block Island (R.I. : Island)1