Do scuba diving in Australia

Another of the amazing experiences I'd like to live is to do scuba diving in Australia's great barrier reef, one of the most beautiful natural places with over 18.000 species of fish, 125 of sharks and more than 5.000 species of molluscs. Is there anything better than swimming between all of them? Of course not, that's why it's one of the must-do experiences in my list, so I promise that when I go to Australia on a trip I'll visit this amazing place.