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A severe marine heatwave has caused nearly 70% coral mortality at Australia's UNESCO World Heritage-listed Ningaloo Reef, one of the world's largest fringing reefs off Western Australia.
Location and Overview
- Ningaloo Reef is Australia's largest fringing coral reef, stretching 260-300 km along the northwest coast of Western Australia near Exmouth, about 1,200 km north of Perth.
- The 705,015-hectare Ningaloo Coast World Heritage Site includes marine and terrestrial areas like Ningaloo Marine Park, Cape Range National Park, and Muiron Islands.
- Named from Aboriginal Wajarri word "ningaloo" meaning promontory or deepwater; traditional owners are Yamatji peoples (Baiyungu and Yinigudura).
Biodiversity
- Hosts over 300 coral species, 500+ fish, 600 mollusks, 650+ crustaceans, 1,000+ marine algae, 155 sponges, and 25 new echinoderm species.
- Features world's largest whale shark aggregation (300-500 annually, March-August), plus humpback whales, manta rays, dolphins, dugongs, and turtles (loggerhead, green, hawksbill; 10,000 nests yearly).
- Terrestrial karst system in Cape Range with rare subterranean species, high endemism in reptiles, birds, and plants; ecotone of tropical-temperate species.
Conservation and Protection
- UNESCO World Heritage Site since 2011 (criteria vii, x) for exceptional seascapes, biodiversity, and whale shark gatherings; Ningaloo Marine Park since 1987.
- Threats include coral bleaching (2011, 2025 heatwaves), tourism impacts, invasives (foxes, cats, weeds), fire, water abstraction, and potential oil extraction.
- Managed via EPBC Act 1999, sanctuary zones (e.g., Jurabi, Tantabiddi), and Ningaloo Collaborative Research Cluster for sustainable tourism and fisheries.
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