A nice cover from Australia, depicting 3 stamps with fishes from the
Great Barrier Reef. The Great Barrier Reef is the world's largest coral reef. It is near the coast of Queensland, Australia. It is made up of nearly 2900 coral reefs and over 600 islands. It is 327,800 km2 big and 2600 km long. It has been listed an important World Heritage Site by UNESCO in 1981. The Great Barrier Reef is the largest structure made by living things. It can be seen from outer space. The Reefs are threatened. The biggest threat to the Great Barrier Reef today is coral bleaching caused by high sea water temperatures as a result of global warming.
