I searching for the Sea Perch mentioned elsewhere I chanced on the best ever website for identifying fish and just having a look at the wide diversity of our fishes.
The name of the site is:
fishesofaustralia.net.au
It is hosted by Museums Victoria with Diane Bray as the curator. This site is so good that it should have its own section of the FBT website. Seriously, copy it to your browser and have a look at it, you could easily spend a day browsing through the pictures as well as learning how to search for fish using key features.
I hope that the powers that be agree with me and make this site a part of FBT.
Cheers
Paikea