carcharocles megalodon

Carcharocles megalodon was an enormous prehistoric shark that roamed the oceans from approximately 23 to 3.6 million years ago, during the Cenozoic Era, and is considered the largest shark to ever exist, reaching lengths of up to 18 meters (59 feet) or more, and possibly weighing as much as 50 to 70 tons; with its massive, serrated teeth—some of which exceeded 18 centimeters (7 inches)—and a powerful bite force, megalodon was a dominant apex predator capable of preying on large marine mammals, including whales and dolphins, making it a fearsome force in the ancient oceans that rivaled even the largest marine predators like Livyatan.