Not to mention if you are really into fish, then the convention and talking with other fish freaks will fill your entire time their.
I think that some will be pre-registered here (www.mygroupauctions.com) - you'll need to register. But the nature of auctions is to wait and see,
There will be tons of fish available starting tomorrow in peoples' rooms (and listed on a board at the convention). There will also be the BABES auction on Sat night.
If there's something specific that you want, it's better to act early than to wait for the auction. Other people are probably looking for the same thing and will beat you to it...
Matt