There is a great book on all Hawaiian inverts by a guy named John Hoover, or maybe Hooker. Buy that, great reference material with all the mantis shrimp you can find in Hawaiin waters. Where in Australia do you live? I went to Townsville in 1999, loved it and want to go back to Australia for vacation again as soon as possible. I should have my PADI certification soon and think it would really be cool to dive around the great barrier reef. Anyways...hope the book helps.