A mystery lump on Ras the camel's ear has everyone stumped, so its time to investigate. But sedating a camel weighing half a tonne is not the simplest procedure to undertake.

It's an emotional farewell as the Taronga marine keepers wave goodbye to 5-year-old Australian Sea Lion, 'Moby'. He's being swapped for another sea lion at a marine park 6 hours' drive north of Sydney, to strengthen the genetic diversity at both zoos.