It's the low moaning sound of the spray bursting from the whale's blowhole that has Deshuan, 9, excited as he peers through the binoculars at the mother and her calf just 20 metres off the cliffs.
"They keep blasting water out," he says, pointing to the back of his head, as he watches the gentle giants of the sea at the Head of Bight, on South Australia's far west coast.
Forty-five children from the nearby Anangu Yalata community are at the Head of the Bight for "whale day", a school outing that's been held for the past 15 years.
