The second edition of the Encyclopedia of Marine Mammals, edited by W. F. Perrin, B. Wuersig and J. G. M. Thewissen, has been published (2009). All articles have been updated. New articles have been added to cover new developments in marine mammal science, such as those related to climate change and the interface of ecology and conservation, as well as some established topics not fully explored in the first edition (2002). Significant changes since the first edition appeared extend to the roster of marine mammsl, with the discovery of new species (e.g., Omura's whale) and the extinction of another (the baiji). These and other changes are fully covered. Most illustrations are now in color. The new edition is available on the internet and directly from the publisher (Elsevier). -- William F. Perrin, Ph.D. Senior Scientist for Marine Mammals NOAA Fisheries Southwest Fisheries Science Center 8604 La Jolla Shores Drive La Jolla, CA 92037 Tel. (858) 546-7096 Fax (858) 546-7003