The front page of the Cape Times today detailed a story about a world record Zambezi shark being caught 5.5km up the Brede River. I did a bit of Googling and found more information and pictures:

• At over 4m long this is the largest Zambezi shark ever caught anywhere – a world record
• The researchers were looking for sharks in the river after reports and rumors that they were in the Brede
• After hooking the shark they were towed 2km further upstream before they could drag her onto the shore for tagging
• She was tagged and tracked over the next 43 hours. She spent most time in the estuary with only short periods in the surf

Awesome stuff. You can get more information from this article