Whale swims free of crocodile-filled Australian river

A humpback whale swims in the ocean in Van Diemen Gulf, Australia (Parks Australia via AP)

A humpback whale has found its way back to sea weeks after it got lost in a murky, crocodile-infested river in northern Australia.

There have been no previous recorded sightings of whales in remote East Alligator River in the Northern Territory’s World Heritage-listed Kakadu National Park, and no-one can explain why at least three of the blue water mammals ventured so deep inland in a river with little visibility.