Great Barrier Reef
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The Great Barrier Reef is the world's longest coral reef system, stretching around 1,430 miles (2,200 km) along the east coast of Australia. It is made up of 2,900 separate reefs, made up of limestone deposited from the skeletons of countless tiny sea creatures. It provides a rich environment for aquatic life: six out of seven of the world’s marine turtles, 1,500 out of 13,000 species of fish, 500 types of seaweed, 360 varieties of coral, 125 species of sharks and rays live in the waters of the reef.
Scientific investigation has shown that the reef could have grown to its present extent in the time since Abraham was alive[1]. Growth rate analysis has shopwn that the oldest reef on earth is 4,200 years old. [2]