| Alaska Dept of Fish and Game-- Harbor Seal Plenty of harbor seal information for species experts. | |
| Alaska Native Harbor Seal Commission Native Alaskan programs for conservation and preservation of Harbor Seal. | |
| Alaska SeaLife Center -- Harbor Seal Photo gallery, scientific and environmental research, causes of decline. | |
| Museum of Zoology -- Animal Diversity Web -- University of Michigan -- Harbor Seal Fact sheet and photo gallery. | |
| NOAA Fisheries, Office of Protected Resources -- Harbor Seal Fact sheet and links to other resources. | |
| Pinnipeds.org -- Harbor Seal Covers distribution, status and lifestyle. Great photos. | |
| Point Reyes National Seashore -- Harbor Seal National Park Service fact sheet with discussion about seal haul outs. | |
| Provincetown Center for Coastal Studies -- ID of Harbor, Gray, Harp, Hooded and Ringed Seals Male and female differences. Drawings and photos of seal heads. | |
| Sea World Harbor Seal Info Information on every aspect of lifecycle plus conservation and reading references for kids. |