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Great Barrier Reef home to giant doughnut-shaped structures with unique animal and plant communities Posted MonMonday 1 updated TueTuesday 2 The fauna and flora communities on the Halimeda reefs are unique, new research has found. ( Print text only Cancel Giant doughnut-shaped limestone mounds sitting in the Great Barrier Reef Marine Park, called Halimeda bioherms, have been building up on the seafloor off the Australian coast since the last ice age. Key points: The doughnut-shaped bioherms are at least 10,000 years old, but scientists aren t sure how they get their shape Researchers found more than 1,300 species living on the formations, with around 40 per cent of those species not found on the surrounding inter-reef

Raine islandMarine parkNew south walesCape york peninsulaCoral seaOceans generalEric wolanskiRobin beamanMardi mcneilEl ninoInternational union for conservation of natureQueensland university of technologyJames cook universityAustralian institute of marine scienceGreat barrier reef marine parkInternational union