|American Cetacean Society Fact Sheet - Harbor Porpoise|
Fact sheet with description of fins and fluke.
|ARKive -- Harbor Porpoise|
Videos, photos, status, and conservation.
|Differences between Dolphins and Porpoises|
Chart illustrating the differences between dolphins and porpoises.
|Harbor Porpoise Information Page|
Lots of background including photos, videos, and tracking information.
|Harbor Porpoise on the Move!|
Has a great video of a harbor porpoise in action.
|Hebridean Whale and Dolphin Trust - Harbor Porpoise|
Detailed physical description, habitat, distribution, behavior, food and conservation status.
|Museum of Zoology -- Animal Diversity Web -- University of Michigan -- Harbor Porpoise|
Fact sheet, focus on conservation status.
|National Geographic -- Harbor Porpoise|
Photos and multimedia with audio.
|NOAA -- Harbor Porpoise|
Fact sheet with good links to other websites.
|Ocean Conservancy Harbor Porpoise|
Contains general information about harbor porpoises as well as threats to them, and how you can help!
|YouTube video -- Harbor Porpoise|
Video of porpoise breathing at the surface.