Patrolling the world's oceans for over 400 million years of evolutionary refinement, the great white shark is nature's most efficient killing machine. Armed with 300 serrated teeth and electroreceptors that detect a heartbeat from yards away, nothing in the sea is safe. A single bite delivers up to 18,000 newtons of force—enough to chomp through bone like breadsticks.

Known as the killer whale despite technically being the world's largest dolphin, the orca is the ocean's most intelligent and ruthless predator. Hunting in pods with coordinated strategies that include creating waves to wash seals off ice floes, they've been observed killing great white sharks purely for their livers. The apex predator of apex predators—nothing in the sea hunts an orca.