Today’s Doodle celebrates Australia's most awe-inspiring feature: its big, blue backyard and treasured natural World Heritage Site: the Great Barrier Reef.

This vast underwater world is home to a whole host of protected and majestic creatures, including the green turtle, pipefish, barramundi cod, potato cod, maori wrasse, giant clam, and staghorn coral, to name a few. Made up of over 2,900 individual reefs, the earth’s largest coral reef system can be seen from space, and is our planet’s single largest structure made up of living organisms.

The reef is tightly woven into the culture and spirituality of island locals who cherished it long before it became a popular tourist destination. A large part of the reef is now under protection in an effort to preserve the shrinking ecosystem impacted by heavy tourism.