Transient Killer Whale
Killer Whale (Orcinus orca)
Overview
Three distinct types of killer whales, often called orcas because of their Latin name, Orcinus orca, can be found in the Salish Sea.
Birds and Mammals that Depend on the Salish Sea: A Compilation
The Mystery of Surplus Predation
In the Salish Sea, some transient killer whales seem to be killing sea lions for no particular reason. Joe Gaydos provided background for a Kitsap Sun piece by Christopher Dunagan discussing the four sea lions apparently killed by blunt trauma from orcas in a single month.
A 2005 publication by Gaydos discussed five harbor seal pups found decapitated by killer whales, but not eaten.
The article discusses possible causes of this "surplus predation" and reinforces the importance of quick reporting of stranded and dead marine mammals, because the faster the animals can be recovered, the more we can learn from them.
Kitsap Sun: http://pugetsoundblogs.com/waterways/2010/05/14/transient-orcas-may-be-l...
Photo: Stranding Network volunteer Maria Webster standing by one of the dead Steller sea lions on North Beach of Orcas just before SeaDoc necropsied it. Credit: Joe Gaydos.
Gray-colored transient killer whale spotted
On December 10, 2009 Capt Jim Maya, a whale watch operator from San Juan Island, photographed this white/gray colored transient killer whale. While nobody knows for sure why this whale is colored this way, grey and albino killer whales have been reported before.

