http://www.answers.com/Q/Who_would_win_a_fight_a_saltwater_crocodile_or_hippo
http://www.dinosaurhome.com/saltwater-crocodile-vs-hippopotamus-i-know-hippos-kill-crocodiles-like-nil...-43227.html
I know hippos kill crocodiles, like Nile Crocodiles. But Saltwater crocs sometimes kill sharks...