In South Australia, a toxic algal bloom has resulted in more than 12,000 marine animals from nearly 450 different species washing up dead on local beaches, turning once-thriving ecosystems into underwater graveyards and leaving locals traumatised... But what's causing this disaster, and what can we do about it?

This week's guest: Stefan Andrews, marine biologist, filmmaker, educator, and Co-Founder of the Great Southern Reef Foundation,

• www.greatsouthernreef.com
• www.instagram.com/greatsouthernreef

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