BBC Two, Tuesday 18 November at 8pm
Beginning at the fabulous coral reef of Ningaloo in Western Australia, intrepid marine biologist Mark Meakin attempts to unravel the mysterious wanderings of the biggest fish in the sea. Whale sharks grow to over 12 metres long but are gentle, filter-feeding giants; even Mark's five-year-old son can swim alongside them. Yet no one knows where they go once they leave Ningaloo's turquoise lagoons.
BBC News: Watch this video of attaching a whale shark cam
Scientists are attaching tags to the biggest fish in the ocean to find out more about them.
Here they attach a camera as well as other instruments to a whale shark.
The footage forms part of a BBC Natural World wildlife programme: Whale Shark.
REPEATED SUNDAY 23rd NOV AT 17:10 ON BBC2
WHALE SHARK CAN ALSO BE VIEWED ON BBC HD Channel
Narrated by Jessica Whittaker
Produced & directed by Emma Ross
Series Editor Tim Martin