The word Megalodon derives from Greek, meaning "giant tooth." The shark's full scientific name is Carcharocles Megalodon. The Megalodon Shark Was The Largest Predator That Ever Lived.Reaching lengths of up to 60-70 feet and an estimated maximum weight of over 60 tons, the Megalodon is the largest known predator in Earth’s history.While most adult Megalodon teeth fell into the 4-5” size range, a few massive, fossil teeth have been found in excess of 7” The largest verifiable Megalodon tooth is a 7.48” tooth found near Ocucaje, Peru.Even though Megalodons and dinosaurs are both extinct, they never coexisted. The dinosaurs died out about 66 million years ago. Megalodons came later. The oldest megalodon fossils are from the Miocene Epoch, which began 23 million years ago.