Gray Whale, Extinct for Centuries, Sighted in Mediterranean : TreeHugger: "This particular whale was sighted off the coast of the Herzliya Marina on May 9th and has raised the possibility that gray whales may be recolonizing a part of the planet they haven't been in for 200 years.
UPDATE: There's more info, including some more personal accounts of the sighting from Israel here: Epoch Times
Whale Would've Had to Surpass All Migration Records
WCDS describes the enormity of the situation:
Gray whales are well known for performing one of the world's longest migrations, making a yearly round trip of 15,000-20,000 km. Over a lifetime, a gray whale migrates the equivalent distance of a return trip to the moon, however, these new images show that this particular whale would have had to beat all previous distance records to end up where it has. Its presence off the coast of Israel will certainly pose a lot of questions to the scientific community."