DavidPT40:Bull sharks can survive for 5 years in fresh water. They are also called the "Zambesie Shark" due to there tendency to frequent the Zambesie River in Africa.
that's correct, in STP very often they go up rivers and stay there, specially after long rains, probably to get some food comming on the waters from the high regions.
i've learned some bad experiences from local fisherman that were attacked close to the sides of the rivers.
i found this shark beaviour very stange.
clear waters.
jb