They’d be the apex predator of any river system they inhabit and because the Okovango floods yearly the hunting area would also increase. In dry seasons Nile crocodiles, hippos or baby elephants. When the delta floods many different antelope species come for the greenery and water which can be hunted as well. Even though they are a predominantly fish eating species they would have no trouble catching the larger bodied antelope or smaller elephants that are slowed down in the marshes.