Just got back from Shedd Aquarium in Chicago, IL. Excellent Amazon display. All p's were extremely thick and large. Every red belly I saw was at least 11"+. In one tank (I would say at least 3,000g+) there were approx. 20 red bellies who were all at least 12in., six or seven oscars (all 13in+), various birds living on the banks, frogs, turtles, etc. Shedd did a great job portraying the Amazon during the rainy season. If you're ever in the Chicago area, I would recommend checking it out. Here are some pics...they may be a little blurry...sorry