A grey whale called Wally is lost in the Mediterranean - far away from its home in the Pacific. Why?

A gray whale, referred to as a “wally” by marine biologists, is lost in the Mediterranean – and it must soon find its way home to survive.

At this time of year, Wally should be 9,000 km off the coast of Alaska. The species usually migrates up and down at the expense of North America, but the melting ice in the Arctic has opened previously closed passages to the Atlantic.

What if Wally doesn’t come back?

Video by Joaquim Moreira Salles