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1,717,854.30 square kilometers is about five times as big as The Great Barrier Reef
In other words, it's 4.940 times the size of The Great Barrier Reef, and the size of The Great Barrier Reef is 0.2020 times that amount.
(a.k.a. Barrier Reef) (Coral Sea, off Queensland, Australia) (approximate)
The Great Barrier Reef, the largest such reef in the world, covers about 348,000 sq. km. Reefs, such as the Great Barrier, grow in diameter at a rate of 1 to 3 cm per year.
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