I found this at work today (haha, gotta love the work ethic), its pretty cool the different species in it and shows a good idea of what an amazonian basin would look like though I wouldn't want to get into the tank to clean it with the crocodiles in there.....
I saw a TV show of that yesterday, the Waikiki aquarium! Their reef tanks are amazing!! O_O
That fish tank is awesome!! The national aquarium here which is about 20 minutes away from me, the Baltimore Aquarium, has an amazon exhibit but I can't recall seeing arowanas. The sign said there was a red-tailed catfish, but I don't recall seeing one either. Lame. <_<