When my wife and I were in Oahu, Hawaii last June, there was this tank that you could look at from the street when you were walking by. I think it was 2-3 stories high, and it was in a mall? I think. I had my FW aquarium, but wasn't into SW yet so I don't remember as well as I should. They had reef sharks, rays, and alot of other awesome fish in the tank. I would have to bet the tank had ten's of thousands of gallons. We saw them feeding one day, and the guy was actually in SCUBA gear. Has anyone else seen the one I am talking about? It is on the main street that runs parallel, closest to the ocean in Waikiki. I am really NOT making this up.