What's the largest living structure on the planet?

Wow, the week has flown by and here is another fun fact for you all! The Great Barrier Reef is an amazing living structure and the largest in the world and it even has it's own postbox 💌 I wonder which of the creatures below is opening the mail the reef gets??? 🐡🦀🐠🐟🐙🦑🐬🐳🐋

Are you loving our fun facts? You can check out all of them here. Or have a look at our wonderful Explore Australia flashcards here!