I'm not sure how many people have the VS network on their cable/satellite system, But if you do you should try and watch this show. I was channel surfing and found it by accident. The few episodes I have seen have been really interesting. Today he was catching payara and jau catfish he also caught a pretty big pacu. I have also seen him catch some monster red tail catfish and golden dorados. It's pretty cool to see how big some of these tankbusters can actually get, and their native habitat.
http://www.huntforbigfish.com/
http://www.huntforbigfish.com/
