Collection place
- Point Reyes, Marin County, California260 objects
- Trinidad Bay, Humboldt County, California257 objects
- Trinidad, Humboldt County, California257 objects
- CA-Hum-169 (Tsurai), Humboldt County, California234 objects
- Alameda County, California198 objects
- CA-Mrn-266, Tomales Point, Point Reyes190 objects
- Tomales Point, Point Reyes, Marin County190 objects
- Berkeley, Alameda County, California188 objects
- CA-Ala-307, Berkeley, Alameda County188 objects
- West Berkeley, Berkeley, Alameda County188 objects
- North Central California113 objects
- Humboldt lagoons, Humboldt County, California103 objects
- Big Lagoon, Humboldt County, California101 objects
- CA-CCo-295, Richmond, Contra Costa County82 objects
- Sacramento County, California77 objects
- Drakes Bay, Point Reyes, Marin County70 objects
- Central California64 objects
- Humboldt Bay, Humboldt County, California63 objects
- Gunther Island, Humboldt Bay, Humboldt County62 objects
- Central California coast60 objects