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Coral
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Coral. Water temperature must be at least 25 degrees Celsius to survive!!! The Great Barrier Reef in Australia can be seen from outer space! The remains of billions of individual creatures! Some coral reefs are 300 metres thick Some coral reefs are 25000 years old!.
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Coral
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Coral • Water temperature must be at least 25 degrees Celsius to survive!!! • The Great Barrier Reef in Australia can be seen from outer space! • The remains of billions of individual creatures! • Some coral reefs are 300 metres thick • Some coral reefs are 25000 years old!
Videos • http://channel.nationalgeographic.com/series/explorer/3092/Overview#tab-Overview • http://www.youtube.com/watch?v=Dm98n3908QM sessile? • http://www.youtube.com/watch?v=WQLfsHMc6jQ reproduction • http://www.youtube.com/watch?v=eyCigZ_bsTM