Final answer:
The Great Barrier Reef is the largest coral reef system located off the northeastern coast of Australia.
Step-by-step explanation:
The Great Barrier Reef is the largest coral reef system located off the northeastern coast of Australia. It stretches for over 2,300 kilometers and covers an area of approximately 344,400 square kilometers. The reef is made up of thousands of individual coral reefs and is home to a diverse range of marine life.
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