Place
- Tomales Bay (Calif.)11
- Africa10
- Asia9
- Northeastern States9
- Central America8
- Maine, Gulf of8
- New Jersey8
- Alameda County (Calif.)7
- Bodega Bay (Calif.)7
- Contra Costa County (Calif.)7
- Long Island Sound (N.Y. and Conn.)7
- Napa County (Calif.)7
- Solano County (Calif.)7
- Stanislaus County (Calif.)7
- Vermont7
- Wyoming7
- Delaware6
- Florida6
- Idaho6
- Iowa6