Dall's porpoises, Phocoenoides dalli, are cool water porpoises inhabiting the North Pacific Ocean and adjacent seas. The central Bering Sea marks the northern boundary of their range and, although they prefer colder water, Dall's porpoises are found in the warmer waters of Baja California on the east to southern Japan on the west. They are frequently observed in these lower latitudes during the winter months. There are potentially two subspecies of Dall's porpoises, although they may simply be color morphs, P. dalli dalli and P. dalli truei. Phocoenoides dalli truei is abundant only off the Pacific coast of northern Japan.
Biogeographic Regions: pacific ocean (Native )
- Klinowska, M. 1991. Dolphins, Porpoises and Whales of the World. Gland, Switzerland: IUCN.
- Reeves, R., S. Leatherwood. 1994. Dolphins, Porpoises and Whales. Gland, Switzerland: IUCN.
- Genther, K. 2000. "Dall's porpoise (Phocoenoides dalli): The difference between the subspecies" (On-line). Accessed March 08, 2004 at http://www.fish.washington.edu/AcademicSite/cap/projects/guenther/.