Oscars @ Shedd's aquarium

Has anyone here been to the Shedd's aquarium in Chicago? A friend of mine and I went this past weekend. The amazon section was my favorite. The oscars there are HUGE! I mean, I am kind of a poor judge of size, especially through the glass, but I thougth these guys were pushing 16-17 inches! No joke. I was stunned. I thought my guy was big, and he's sittin at 13-14in. If I had to guess, I'd say that the big guys in those tanks had to weight atleast 3lbs or more. (I fish bass tourneys in the summer, that's what I'm basing my guesses on.) I took pics which I'll post when I get home, but there is nothing in the background to compare size to. Anyone else seen these guys and thougth the same thing?