Measuring up to 65 feet in length and weighing as much as 60 tons, it dwarfed even today’s great white sharks.. Not only was megalodon the biggest prehistoric shark that ever lived;
It was the largest marine predator in the history of the planet, vastly outweighing both the modern great white shark.. Meaning big tooth), commonly known as megalodon, is an extinct species of giant mackerel shark that lived approximately 23 to 3.58 million.