MarineBio Conservation Society
Marine Bio: Harbor Porpoises
Illustrated reference tool provides an overview of the harbor porpoise with details on physical characteristics, behavior, range, habitat, diet, and conservation status.
Smithsonian Institution
National Museum of Natural History: American Mammals: Harbor Porpoise
Large numbers of harbor porpoises are caught in fishing nets, because the porpoises feed on schooling fish such as herring and mackerel, in relatively shallow coastal waters. They are also affected by increasing pollution in coastal...