It is so विशाल that astronauts can see it from outer space.
It supports over 1,500 species of fish and 400 types of coral.
The reef is protected as a UNESCO World Heritage Site since 1981.
It is the biggest structure made by living organisms.
Rising ocean temperatures cause coral bleaching, damaging the reef.
It provides shelter and food for countless marine animals.
Millions of tourists visit each year for snorkeling and diving.
The reef includes over 900 islands and 2,900 individual reefs.
The reef is around 20 million years old in its current form.
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