OK with Crocodile hunter and shark week all the rage, it seems only natural to vote for you favorite deadly sea / amphib. What water based animal do you think is the deadliest. For me, it was almost a tossup. Killer whale or great white (full grown) I lean more toward the Killer whale because of it's brain. Despite the movies, great whites don't have rational thought in when, how and what they attack. I am sure even they stay away from killer whales and I think Killer whales probably wouldn't deal with a large great white unless it was after a calf. Crocs and hippos just arent in the same ballpark as these two denizens of the deep