In the flood waters after Katrina I saw both Sharks and Alligators feeding on dead animals and bodies in the streets of New Orleans. You didn't see that reported on U.S. mainstream news.http://www.snopes.com/info/notes/katrina.asp
Is it true that there has been video footage of sharks swimming in the floods in New Orleans?
Various news accounts have reported people claiming to have seen sharks swimming in the floodwaters around New Orleans, but the reliability of such accounts is difficult to ascertain.
So now we have an eyewitness