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Megalodon Shark Facts: Size, Extinction, Sightings and Other FAQ

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With interests in science and nature, the author explores topics from a unique and sometimes controversial perspective.

Discover interesting facts about Megalodon, the biggest shark that ever lived!

Discover interesting facts about Megalodon, the biggest shark that ever lived!

The Megalodon shark was one of the most terrifying creatures that ever lived on our planet. It was the largest predatory shark ever, even more powerful than the largest dinosaurs. It grew to the size of tractor-trailer semi-truck, and it ate whales for breakfast.

It may sound like a monster from a horror movie, but Megalodon was a real shark, and it really did exist in our world's oceans at one time. We all know how dangerous a Great White Shark is, and in Megalodon we imagine a shark with the same instincts and ferocity, but much, much larger. It’s no wonder this amazing shark has sparked the curiosity of so many people!

This article will help you learn more about the Megalodon shark. First, we'll look at the real Megalodon. Scientists and researchers think they know quite a bit about how this massive shark lived, and you can find the answers to your questions here.

Then, we will explore the possibility that Megalodon could still be alive today. It seems unlikely, but some researchers think it is possible. When we talk about a modern Megalodon we are entering the world of cryptozoology.

Read on and learn more about the Megalodon shark!

Megalodon Facts: The Real Shark of Paleontology

Megalodon was a real shark, and it ruled the ancient ocean. Modern science confirms this. So, have you ever wondered what the real Megalodon shark was like?

Researchers have taken what they learned from studying Megalodon fossils and filled in the blanks a bit with what they know about modern sharks. The result is a fairly clear picture of what Megalodon was probably like. Of course, since the shark isn't around today we can't know for sure, but experts can make some pretty good guesses.

Here are some facts in answer to questions often asked about the real Megalodon shark:

When did Megalodon live?

Estimates vary, but a good guess is Megalodon first appeared as early as 28 million years ago, and last appeared about 1.5 million years ago. Some researchers have calculated a slightly narrower range, more like 20-2 million years.

What evidence is there that this shark really existed?

Fossilized teeth, some of which measure seven inches in height, are the main pieces of evidence here. There are also rare examples of vertebrae. Because shark skeletons consist mostly of cartilage, these are the only parts that fossilize. But there are also marks on whale bones, which match with Megalodon teeth. This tells us a great deal about the size and behavior of this shark.

How big was the Megalodon shark?

Big. An accepted estimate today is 50 to 60 feet, and perhaps 60 to 70 tons, but of course, we can’t know for sure. Researchers use calculations based on White Shark measurements and fossilized Megalodon teeth and vertebrae to determine the size of an adult megalodon. Early researchers thought it could have reached up to 100 feet in length!

Check out the image below of the Megalodon shark compared to a human. Yikes!

Megalodon was the largest shark that ever lived, and some specimens may have topped 60 feet.

Megalodon was the largest shark that ever lived, and some specimens may have topped 60 feet.

What did Megalodon eat?

Anything it wanted! Prehistoric whales would have been on the menu, as well as sea lions, dolphins, and even giant sea turtles. Megalodon was the apex predator of its day, and a full-grown adult would have been capable of taking on the biggest whales in the ocean.

How did Megalodon hunt?

Researchers think Megalodon was a coastal hunter, similar to a Great White. This means it would have stayed relatively close to shore. Of course, Megalodon would have chosen much larger prey than the Great White. However, even today many whales pass close to shore during their migrations, so it is easy to see why Meg would have used this hunting behavior.

Did Megalodon have any enemies?

Maybe! During part of the time when Megalodon lived there was a massive predatory whale called Livyatan Melvillei. It grew as large as Megalodon and had teeth a foot long! Since Megalodon preyed on whales, we have to wonder who got the best of who when these two monsters met.

Where did Megalodon live?

Megalodon would have lived in all the oceans of the world, as the seas were warmer back then. Juvenile sharks likely spent more time near the coast in shark nurseries, similar to Great Whites. Adults would have been found in deeper water where larger prey items were located.

Why did the Megalodon shark go extinct?

According to one theory, when the oceans cooled during the last ice age it upset the warm-water ecosystems where Megalodon thrived. In another scenario, the die-off of many of the giant shark’s prey items made food sources scarcer. It’s also possible that the evolution of predatory whales and other sharks presented more competition for Megalodon.

Did increased competition from predatory whales and other sharks lead to the extinction of the biggest shark that ever lived?

Did increased competition from predatory whales and other sharks lead to the extinction of the biggest shark that ever lived?

Did Megalodon live at the same time as humans?

No, at least not Homo sapiens. The last Megalodon lived around 1.5 million years ago at the latest. While there would have been early human ancestors around at the time, modern humans did not evolve until much later.

Did Megalodon live at the same time as dinosaurs?

No again. The mass extinction of the dinosaurs occurred about 65 million years ago. Megalodon wouldn’t arrive on the scene for another 40 million years.

Did Megalodon evolve into the whale shark?

No. While it is similar in size, the Whale Shark is a filter feeder whereas Megalodon, like the Great White, was a predatory hunter. More significantly, these two sharks are of different orders and families in the shark family tree. So, while they are distantly related, one did not evolve into the other.

Is Megalodon just a big great white shark?

This was once thought to be the case. Some paleobiologists believed Megalodon should be classified within the genus Carcharodon, which would make it a relative of the white shark. Others said it ought to be in the genus Carcharocles, which means it would have evolved in line with other prehistoric giant sharks and has no living relatives. The current school of thought is to classify Megalodon in the genus Otodus, another extinct lineage of predatory sharks. This means it probably did not look like a great white at all.

How did Megalodon get its name?

The word Megalodon is derived from two Greek words which together mean "Big Tooth". It is easy to see why early researchers would have chosen this name! Some fossilized megalodon teeth are as big as a grown man's hand.

Megalodon vs Whale

Alleged Megalodon Sightings

Interestingly, some people believe Megalodon is still out there in the ocean somewhere, alive and well. How could this be possible, and where is the evidence?

A living Megalodon is a fascinating concept for cryptozoologists, novelists, documentary filmmakers, and even internet bloggers. The debate really took off when the Discovery Channel aired Megalodon: The Monster Shark Lives for Shark Week 2013. With the wave of controversy that followed this fake Megalodon documentary, it seemed like everyone was suddenly interested in the beast.

Below you can find the answers to a lot of questions. Feel free to ask more questions in the comments section below.

Could Megalodon still be around today?

It is extremely unlikely. Megalodon was a coastal hunter and if it still existed today there would be easy proof. Some cryptozoologists argue that the ocean is a vast place, and largely unexplored. Almost anything could exist out there, and remain undetected for a long time. However, for Meg to exist today it would have had to evolve into something very different, and there is absolutely no evidence.

What the heck is cryptozoology?

Cryptozoology is the study of animals that might exist, but there is no scientific proof to say they’re really out there. Like Bigfoot, or the Loch Ness Monster. Even though Megalodon really did exist once upon a time, when we talk about the modern Megalodon really we’re talking about a creature unsupported by science.

So why do some people think Megalodon is still alive?

Mostly because of alleged sightings of massive sharks by fishermen, but there’s also the matter of the Megalodon teeth dredged up during a 19th-century expedition that dated to as recently as 10,000 years old.

What are Megalodon sightings really?

Many credible Megalodon sightings can be attributed to large great white sharks or even misidentified whale sharks. White sharks can grow to over 20 feet in length, maybe more, and whale sharks can top 40 feet.

Sightings of massive great white sharks may account for some stories of modern megalodon sightings.

Sightings of massive great white sharks may account for some stories of modern megalodon sightings.

Could Megalodon live in the Mariana Trench?

It is unlikely. Remember that Megalodon was a coastal shark that ate whales, seals, and other marine mammals. To exist at that depth it would have had to evolve to feed on other food sources. There is some evidence that Great Whites may dive deep to feed on squid, but they don't stay down there for their whole lives.

Are there any pictures of Megalodon?

Yes, lots of them, but they are all fake.

Are you sure? Because I saw this video on YouTube . . .

Rest assured that if a living Megalodon were to really be captured on film it would be the discovery of the century. It would be like discovering a living dinosaur. Every marine biologist in the world would be talking about it, and we wouldn’t need to speculate on whether or not a YouTube clip is real.

How can I study Megalodon for a living?

You can become a paleontologist. Paleontologists study prehistoric animals by examining the fossil record. Or, you can become a marine biologist if you want to study sharks in general.

How can I search for Megalodon?

If you want to search for this giant shark you’ll likely be calling yourself a cryptozoologist, and doing it on your own dime. There aren’t a lot of grants available for cryptozoology, and it’s considered a pseudoscience by most professionals. However, a strong background in both paleontology and marine biology would help you in your quest. Many cryptozoologists are distinguished in other related fields and do their cryptid hunting on the side. Others work in a completely unrelated profession.

I’m writing a report on the Megalodon shark. Where should I start?

Start with the real-life ancient shark and study what modern science knows about the creature. Then you may wish to move on to the cryptozoology side, and discuss the possibility that Megalodon is still alive today.

References and Further Reading

This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional.


Al on August 05, 2020:

I thought the meg was 2 t-rexs long s

shyra-leah jones on June 28, 2020:

the megalodon in size can grow up to 45 to 60 feet and it has the most powerful bit of all sharks

Jacob Thomas on March 25, 2018:

If the Megalodons are still alive, life would be like the movie JAWS, but a whole TON scarier. no human taking a lovely beach swim would be safe. I mean, imagine; a Megalodon tries to eat an entire shipment vessle!!! I would be scared.

Username on February 27, 2017:

I believe that Megalodon is alive only changed enough to survive...

Kaycee on June 09, 2016:

Megalodon is still alive. I believe there are megalodon Sharks out there somewhere

Paxton8 on March 22, 2016:

I like meglodons if you ever discover they are real it will be cool and scary.

Nickname on March 15, 2016:

Boy if the megalodon was in agario agario would have been ended plus lets be happy it is not living today the megalodon

Elexus Moe on February 04, 2015:

I do believe that the Megalodon still does exist. We are not positive if this creature still exit, it might be hiding in the ocean!!

Elects Moe on February 04, 2015:

I do believe that the megalodon still does exist, however the megalodon could be hiding in the deep in the ocean.

Anthony Altorenna from Connecticut on August 24, 2014:

Just the size of a fossilized Megalodon tooth is enough to know that a huge shark once roamed the sea. Even if wasn't quite a large as the scientists estimate, it was still a massive killing machine.

Tay on August 11, 2014:

I believe the Megalondon never existed but there may have been an growth to the Great White species that was unrecorded or a living jaws perhaps same as mermaids people started as fish then evolved to humans and then caveman and what we have today but some didn't quite evolve all the way and then there became more and more merfolk and now they could be extinct and may have been extinct by the Megalondon then the shark became extinct.

cryptid (author) from USA on July 03, 2014:

Hi Angela. I understand your skepticism. However, fossilized Megalodon teeth are actually not all that rare, so there is a large sample from which to draw data. More rare are Megalodon vertebrae, but there are instances where they have been found too, even large sections of vertebral column.

You are right that there is no way to reliably reconstruct this shark as they would a dinosaur, but paleontologists can deduce a great deal from just a few fossils. There is no debate that this shark once existed, but you are also right that scientists make a lot of educated guesses based on what is known of the natural world.

And they change their minds as new evidence presents itself. Not that many years ago many dinosaurs were depicted far differently than we see them today. Some don't even have the same names they did when I was a kid.

So, I wouldn't say Megalodon is 99% theoretical, as there is ample proof of its existence and some strong educated guesses about it's behaviors and physiology. But of course nothing is certain, and there surely could be additional information discovered that sheds some new light on this prehistoric shark in ways we never imagined.

Angela on July 03, 2014:

I find the idea of Megalodon to be fascinating, but I just can't bring myself to believe it. There is far too much supposition around a tooth. Just because the tooth matches the basic shape and assumed functionality of a shark's tooth, doesn't mean it came from a shark at all. Sharks are almost all cartilage, and if they were not alive today we would have no way of knowing what they were. To reference the video above, the cuts in that whalebone also could have come from anything at all. The tooth of course is an option, but also consider any number of predators, age, environmental factors, etc. When it comes down to it, its just a tooth.

This isn't like a dinosaur where we can at least have an idea of their body shape due to discovery of mostly intact skeletons. The Meg is absolutely, 99% theoretical. Please correct me if I am wrong.

Maybe the idea is more "Wow, what if....." and if so then that's very cool. But like the video above I often see Meg presented as fact, and I just can't get on board with that with the present information.

jess on June 02, 2014:

i think megalodon is cool

cryptid (author) from USA on August 12, 2013:

I think it's unlikely mermaids and Megalodon exist today, but I like to think anything is possible. :-)

LIL MAMA on August 11, 2013:

do you really think magladon and mermaids are not real , It would be something if both were study in the same place might be a connection, we don't know what is really down in the depth of the water, there are some things out their we are now finding out so the mabys are their,