Top 10 Deadliest Prehistoric Animals

The reason Megalodon is so terrifying is that we know so little about it. The only trace time has left of its existence in the oceans of this planet is its huge teeth.

We may never know for sure its true size or what it looked like. It could be out there now, and we wouldn't know. Only 5% of the ocean has been explored. That's highly improbable, but it could be out there.

The Megalodon is a perfect example of a creature so deadly that it could kill you, and you'd die never knowing what hit you. The Megalodon was the god of the oceans, feasting on practically any creature. It had an amazing sense of smell and vision, and could sink its enormous, powerful teeth into nearly any creature it wanted.

At more than 50 feet in length, it was the largest shark to ever live. It could swim fast, and the most astonishing thing about it was its jaw power. Its teeth were already sharp enough, but combined with a jaw strength of over 18.2 metric tons (more than 40,000 lbs), it had a force strong enough to crush a whale skull effortlessly.

Combined with its enormous, sharp teeth, the Megalodon could kill nearly any creature almost immediately. The Megalodon was truly the most powerful giant beast to have ever lived.

The general consensus is that Tyrannosaurus rex is the ultimate predatory dinosaur, but I'd be inclined to contest this. Spinosaurus was quite a lot larger (it wouldn't be so big just to hunt fish). It had a weaker but still lethal bite, very powerful arms equipped with claws that were longer than T. rex's entire arm, and the ability to survive in water - an ability that T. rex severely lacked.

Carcharodontosaurus rivaled, if not surpassed, T. rex in size, but Spinosaurus still dominated the environment. So if it came to a fight, I highly doubt it would be an easy win for the Tyrannosaurus.

Why is Andrewsarchus ahead of the saber-toothed cat? I understand why Megalodon is higher, but Andrewsarchus, really? The saber-toothed cat was a dominant predator during the Ice Age!

The last thing an Entelodont would hear before its organs were clawed out on the floor.

Titanoboa, which was about the same size as Sarcosuchus, could have potentially killed it. This giant snake could swim in waters and might have been able to swallow a saber-toothed cat in one gulp. At 40 feet long (about 12 meters) and weighing 400 pounds (approximately 181 kilograms), I think it should be in second place on the list.

Huge. Snake. This beast could eat a school bus. I'm not sure why it would want to, though. If you're afraid of snakes, don't look this up.

A 40-foot-long constrictor with 400 pounds per square inch of pressure. That's equivalent to being crushed under the weight of three Eiffel Towers.

Tyrannosaurus rex is considered one of the strongest carnivorous dinosaurs based on factors such as bite force, jaw gape, teeth size, overall size, and weight. Full-grown adults could reach lengths of 12-13 meters and weigh between 8-9 tons, with the largest individuals possibly approaching 10 tons. T. rex was also one of the most advanced predatory dinosaurs, with exceptional vision, a keen sense of smell, and the ability to run at speeds of up to 30-35 km/h, making it a highly effective predator.

Why is this not number one? Doesn't his name mean tyrant lizard king?

Best non-marine predator and fighter.

Predator X can't beat the Megalodon!

Deinosuchus was about twice the length of today's largest crocodiles, and significantly heavier, possibly up to 10 times the weight. It had a powerful jaw, capable of delivering one of the strongest bite forces among prehistoric animals. Its teeth were razor-sharp, making it a formidable predator. However, claims that it could outsmart or hunt dinosaurs like T. rex and Spinosaurus are speculative and not supported by evidence. Comparing Deinosuchus to other prehistoric creatures is common, but direct confrontations between species from different time periods are purely hypothetical. While Deinosuchus had a powerful bite, there's no concrete evidence to suggest it was far more deadly than a T. rex. The analogy of being bitten as equivalent to stabbing oneself with 250 sharp pieces of glass is hyperbolic and not scientifically accurate.

Deinosuchus sp., consisting of two species, was among the largest crocodilian-like animals. At maximum size, it could reach 8-10 meters in length and weigh between 5-8.5 tons for the largest individuals. Deinosuchus was likely capable of overpowering most, if not all, carnivorous dinosaurs that lived in its time, particularly the largest individuals.

This carnivorous dinosaur, along with Giganotosaurus, comes in after Spinosaurus and Tyrannosaurus rex in terms of size, weight, and power.

This lizard was essentially a 30-foot-long monster that prowled the Australian Outback 40,000 years ago. It would have been your worst nightmare if you came across one. The name "Megalania" is derived from Greek, meaning "Great Roamer" or "Great Wanderer."

It was made of pure solid muscle, a rapacious demon with curved fangs possibly harboring deadly venom used to dispatch victims with a single bite. Even if the victim - typically a giant kangaroo (Procoptodon) or the wombat (Diprotodon) - got away, they would soon fall to shock-induced blood loss and die later, leaving a tasty corpse for the monitor to find, much like today's Komodo Dragon.

Even real dragon wyrms, which were said to breathe fire, would have thought twice before encountering a reptile of this size, if they lived in prehistoric Australia. However, as was the case with other reptiles like the running Game of Thrones-sized, real-life lizard lion known as Quinkana fortirostrum, its relative Pallimnarchus, the serpent Wonambi naracoortensis, and the Thylacoleo carnifex (a.k.a. Marsupial Lion), its rule came to an abrupt halt, coinciding mysteriously with the arrival of humans on the continent.

While there is no doubt that this legendary creature could certainly kill Aborigines, the intelligence and cunning of its human competitors finally proved fatal. Yet the phantom of this monster lives on in memory, sending chills down one's spine at the mere thought of it.

Easily one of the most intimidating animals to ever walk the earth.

To all those who vote for Tyrannosaurus by default and rant about it being the ultimate predator, go back in time twenty thousand years and say you don't respect a 1,000 lb bear killing lion.

The cave lion (American Lion) was the largest true feline ever to exist. Although Smilodon was slightly heavier, Smilodon wasn't a true cat. If the cave lion existed today, it would be my favorite animal.

It had a bite force of over 1,600 psi (pounds per square inch). It could grow up to 12 feet in length, 5 feet in height, and weigh over 930 lbs. It could withstand high pressure on its head.

Its greatest competitor was the short-faced bear (Arctodus simus), a very close cousin of the modern-day spectacled bear. To learn more about the bear and the cave lion, you can watch Jurassic Fight Club: Ice Age Monsters.

Sarcosuchus imperator was indeed one of the largest crocodile-like creatures that ever lived, with a maximum length estimated at around 9 meters and a weight of about 2.4 metric tons. Larger individuals might have existed. It could have preyed on a range of dinosaurs, from small to large. Compared to Deinosuchus, Sarcosuchus had a longer snout, which might indicate a difference in hunting style or prey preference. Its bite force may have been less powerful than Deinosuchus's, though the exact figures are uncertain. Purrusaurus is another large prehistoric crocodilian that isn't often mentioned but could be relevant in comparisons.

Excuse me, but how is this guy seventeenth?! He could easily kill a T. rex.

Dunkleosteus was one of the first super-predators, in my opinion. It lived during the Devonian period. It was a twenty-foot fish that did not have teeth but instead had scary-looking plates.

It looks goofy yet still terrifying.

Its bite force was absolutely insane!