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Spatial Coverage
- Mexico, Gulf of18
- Gulf Intracoastal Waterway17
- Alaska16
- Caribbean Sea14
- United States13
- North Pacific Ocean11
- Long Island Sound (N.Y. and Conn.)8
- Massachusetts7
- North America7
- Ontario, Lake (N.Y. and Ont.)7
- Siberia, Eastern (Russia)7
- Atlantic Intracoastal Waterway6
- North Atlantic Ocean6
- Saint Lawrence River6
- Saint Lawrence Seaway6
- Bering Sea5
- Delaware River (N.Y.-Del. and N.J.)5
- Florida5
- Huron, Lake (Mich. and Ont.)5
- Michigan, Lake5
