World Heritage-listed Ningaloo Reef hit by 'catastrophic' bleaching event | 7.30

We hear often about the impacts of coral bleaching on the Great Barrier Reef, but there's a pristine reef on the other side of the country that has mostly evaded heat stress, until now. 7.30’s Rhiannon Shine reports. Subscribe: https://ab.co/3yqPOZ5 Read more: https://www.abc.net.au/news/2025-08-1... Welcome to ABC News In-depth, where you'll find our long-form journalism and other videos to help you understand what's going on in the world around you. Watch more ABC News content ad-free on ABC iview: https://ab.co/2OB7Mk1 For more from ABC News, click here: https://ab.co/2kxYCZY Get breaking news and livestreams from our ABC News channel:    / newsonabc   Like ABC News on Facebook:   / abcnews.au   Follow ABC News on Instagram:   / abcnews_au   Follow ABC News on Twitter:   / abcnews   Note: In most cases, our captions are auto-generated. #ABCNewsIndepth #ABCNewsAustralia