Olwison being deeply connected, knows the truth, he can sense the lies emanating from the mouth of the Devil Fish.
Olwison knowing it's likely his last long trip with the herd, and of course being very old and knowing did not have much time to live he devisesed a plan and went back to the herd. He gathered the herd, and brought them to the river.
Olwison: ''We are going to cross the river now, please tell your fish friends to keep their distance so as not to spook the herd, especially the women and children. I am going to be the first of the herd to cross, so I can prove to the rest what gentle creatures you are.''
Olwison puts something in his mouth.
As the cow was crossing the river Devranha and mates swam up to his ankles and started to chew his legs off.
Devranha: "Mmmm. Tastes just like beef"
The piranha's devoured Olwison in a matter of seconds. As the swarm left the sinking carcass, with full little bellies, Devranha turned to his other companions and belched :"BURP! I just love April fools' day ... don't you?''
Soon, after devouring the cow the piranhas started dying, Olwison had poinsoned himself before entering the river sacrifing himself to provide a save passage to the rest of the herd.
By Damon and RobertTM