Great Barrier Reef

1. The Great Barrier Reef is considered the largest living creature.

2. Calcium Carbonate is the compound extracted to make coral.

3. The red algae is credited for actually building the coral.

4. The Great Barrier Reef became a national park in 1975.

5. Around 33% of the reef is protected from fishing.

6. Scientists beleive that the current reef is about 20,000 years old and the acient reef is about 500,000 years old.