Orca predation on grays is an increasing phenomenon, and has been reported in Russia
as well as the US west coast
. Some people think this is being driven by a lack of other food
sources for orca, but I find this curious given explosions of pinniped populations in recent years, especially among sea lions, and a corresponding decline in shark populations, since sharks would be the orca's major competition for food
A group called the California
Gray Whale Coalition his organized around this phenomenon, but I find them to be comprised of more Hollywood types than science types. Still...