Livyatan – The Giant Killer Whale of the Miocene 🐋🦴 Livyatan melvillei was a massive predatory whale that lived about 12–13 million years ago in the Miocene seas off Peru. It was one of the top ocean predators of its time, rivaling even the giant shark Megalodon. This leviathan could grow up to 17 meters (56 feet) long and had enormous teeth over 30 cm (12 inches) long—the largest of any known animal. Unlike modern sperm whales that feed mostly on squid, Livyatan hunted large prey, including o