Three distinct groups of killer whales (Orcinus orca) occupy the coastal waters of the northeastern Pacific. These groups—northern and southern residents, transients, and offshores—are distinguished by diet, behavior, morphology, and other characteristics. Among these, southern resident and transient killer whales commonly are found in Puget Sound. Northern residents and offshore killer whales rarely enter Puget Sound (Wiles 2004, Kriete 2007), and therefore are not described in detail here.
By Tim Essington, Terrie Klinger, Tish Conway-Cranos, Joe Buchanan, Andy James, Jessi Kershner, Ilon Logan, and Jim West for the Puget Sound Science Update