Megalodon: This massive prehistoric shark, which lived around 23 to 3.6 million years ago, could grow up to 60 feet long and had enormous teeth designed to rip through flesh.
Titanoboa: This giant snake, which lived around 60 million years ago, could grow up to 42 feet long and weighed about 2,500 pounds. It was capable of constricting and consuming large prey, including crocodiles.
Spinosaurus: One of the largest carnivorous dinosaurs, Spinosaurus lived around 100 million years ago and could grow up to 59 feet long. It had a sail-like structure on its back and was both land and water-dwelling.
Sarcosuchus: Also known as the "SuperCroc," this enormous prehistoric crocodile lived around 112 million years ago and could grow up to 40 feet long, preying on dinosaurs and other large creatures.
Gorgonops: This fearsome predator lived around 260 million years ago and had long, saber-like teeth. It was a top predator of its time, hunting large prey with its powerful jaws.
Quetzalcoatlus: This giant pterosaur, which lived around 70 million years ago, had a wingspan of up to 36 feet. It was one of the largest flying animals of all time and likely preyed on small dinosaurs and other animals.
Dunkleosteus: This prehistoric fish lived around 358-382 million years ago and could grow up to 33 feet long. It had a heavily armored body and powerful jaws with sharp, bony plates instead of teeth.
Liopleurodon: A marine reptile that lived around 160 million years ago, Liopleurodon could grow up to 33 feet long and had a strong, muscular body ideal for hunting large marine prey.
Andrewsarchus: This large, wolf-like predator lived around 45 million years ago and is thought to be one of the largest land mammalian carnivores, with a skull measuring about 3 feet in length.