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16 Prehistoric Sea Monsters That Deserve as Much Attention as Megalodon

The sea was once filled with the craziest animals.

Hollywood loves a good megalodon movie. (Hence why "The Meg" will hit theaters in August.) The traditional shark film gets ramped up to a whole new level thanks to the megalodon's prehistoric size — it was three times as large as today's great white shark.

But while there are already a ton of projects about this one type of shark, the movie industry doesn't have to keep dipping into the same well. There are a ton of prehistoric sea monsters that would make for just as exciting a film.

1. The Stethacanthus

As marine biologist Dr. David Shiffman pointed out, there are tons of non-megalodon animals worth exploring — and this comb-headed Stethacanthus is definitely one of those. As Azula previously reported, no one really knows why it has that weird AF spiky dorsal fin, and a movie could have a lot of fun trying to explain it.

2. The Melksham Monster

As Azula previously reported, this saltwater crocodile lived 163 million years ago. Its discovery actually changed what scientists knew about how crocs evolved, because it proved they came around much earlier than previously thought.

3. The Sea Scorpion

These 8-foot water dwellers are the stuff of actual nightmares. Move over megalodon — the sea scorpion is way more menacing.

4. The Mosasaurus


There's a reason this prehistoric creature was included in "Jurassic World" — it's terrifyingly huge and vicious.

5. The Helicoprion

prehistoric sea monsters Public Domain

Why does Hollywood keep repeating megalodon movies when it could be getting to the bottom of how on Earth that saw-jaw works?

6. The Dunkleosteus

A fish with blade-teeth is just as scary as a giant shark. As Azula previously reported, the Dunkleosteus was larger than an orca and could snap sharks clean in two with its sharp chompers.

7. The Odobenocetops

prehistoric sea monsters Public Domain

We'd all go see a movie about a half-narwhal, half-manatee, as BBC describes this ancient creature with the lopsided giant tooth.

8. The Elasmosaurus

prehistoric sea monsters Public Domain

Per BBC, this lengthy ocean creature would sneak up on prey and smack them with its long neck to stun them. Savage.

9. The Godzilla Shark

We see your megalodon and raise you a Godzilla shark, which had giant dorsal spines and super-sharp teeth, according to Discovery. Based on how much cinema loves Godzilla movies, these sharks are ready for their close-ups.

10. The Basilosaurus

prehistoric sea monsters Public Domain

Also known as "king lizard," this animal was actually a whale. (Yeah, scientists never seem to get names right.) Azula previously reported that this 60-foot creature looked like an eel with legs and could bite with 3,600 pounds of force. So, yeah, not a creature you'd wanna meet in the sea.

11. Livyatan Melvillei

prehistoric sea monsters Public Domain

According to Discover magazine, this giant whale lived at the same time as the megalodon and it ate other whales. Now that's a deep-sea monster. (Bonus points for being named after "Moby Dick" author Herman Melville.)

12. The Kronosaurus

prehistoric sea monsters Public Domain

This 30-foot ancient animal has spiny teeth and flippers that allowed it to "fly" through the water, according to the Australian Museum. You certainly wouldn't want to see it come zipping toward you during the Cretaceous Period.

13. The Edestus

The banana-peel-type lips of this ocean giant revealed rows of sharp teeth that no animal would want to come into contact with.

14. TheThalattoarchon Saurophagis

NatGeo reports that this bus-sized animal's name translates to "lizard-eating sovereign of the sea." Move over megalodon; there's a new sea sovereign in town.

15. The Hybodus

These sharks had a row of spikes on their heads — as if their sharp teeth alone weren't already frightening enough.

16. People-Sized Penguins

Sure, megalodons are cool because they're super-sized sharks. But did you know that, as Azula previously reported, prehistoric penguins were the size of humans?

Just imagine that monster movie ...

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