closeup of V-shaped saddle patch on octogenarian female orca L25 Ocean Sun, born about 1928
These are salmon eating orcas, often referred to as southern resident orcas. This kind of saddle patch with black intrusion is only found on fish-eating orcas; on mammal-eaters, it is always gray throughout . Photo taken from Island Explorer 3 operated by Island Adventures Whale Watching, Anacortes, WA.
© 2013 Andrew A Reding. Comments (including corrections) invited. Photographed RAW, so customizable. Photos are reduced; check my profile page for information on use of full-size originals.