When algae turned the water at Bondi Beach blood red

On 26 November 2012, Australia’s iconic Bondi Beach was closed as the crisp, blue coastline turned red.

And although many likened the newly blood red waters to that written in scripture, it was in fact algae that was responsible for the beaches temporary pigmentation.

Although not necessarily life threatening algal blooms as they’re known can be harmful, as dangerous toxins can reside in the water where the bloom occurs and damage important marine life and ecosystems.


  • Gustaaf Hallegraeff – Professor at the Institute of Marine and Antarctic Studies at the University of Tasmania.
  • Associate Professor Shauna Murray from the Climate Change Cluster at the University of Technology Sydney.

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