Foam swallowed an entire beach and half the nearby buildings in a freak display of nature at Yamba in New South Wales.
It was as if someone had poured tons of coffee and milk into the ocean, then switched on a giant blender.
One minute a group of teenage surfers were waiting to catch a wave, the next they were swallowed up in a giant bubble bath. The foam was so light that they could puff it out of their hands and watch it float away.
It stretched for 30 miles out into the Pacific in a phenomenon not seen at the beach for more than three decades.
Scientists explain that the foam is created by impurities in the ocean, such as salts, chemicals, dead plants, decomposed fish and excretions from seaweed.
All are churned up together by powerful currents, which cause the water to form bubbles.
A picture of my cave
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