Additional
Information: The family Phocoenidae, consisting of 6 species in 4 genera.
Porpoises Sites:
Porpoises Porpoises: Description of the family Phocoenidae and its members from Walker's Mammals of the World. (Porpoises) http://www.press.jhu.edu/books/walker/cetacea/cetacea.phocoenidae.html
The Porpoise Page The Porpoise Page: Information on the physiology, morphology, and life history of porpoise species (Family Phocoenidae), with explanation of the difference between porpoises and dolphins. (Porpoises) http://www.theporpoisepage.com/
Phocoena.org Phocoena.org: Porpoise science and conservation, includes news and profiles of each species. (Porpoises) http://phocoena.org/