Most 20 Prehistoric Sea Creatures

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“We know only too well that what we are doing is nothing more than a drop in the ocean. But if the drop were not there, the ocean would be missing something.”― Mother Teresa.

When you will in front of the sea you would forget your daily lag. Well, today we are here not to talking about the beauty of the beauty that we can see, we are here with something more interesting!

Here in this article, we have assembled 20 photos of prehistoric creatures of the sea that existed on this planet million years ago.

You even can’t imagine how they look and their behaviors! let’s jump into the photo gallery and discover the inner beauty of the sea.

1. Rodhocetus

Source: Cetacea (Mammalia): Evolutionary Pattern and Developmental Correlations” (2002), Image: Wikimedia

In this picture, you can see one of the most well-known creatures in the Cetaceans, which contains whales, marshland dolphins, and porpoises.

In most instances, this gigantic animal’s features strongly match that of land mammals.

2. Pelagornithidae

Source: Journal of Vertebrate Paleontology, Image: Wikimedia

This is some funny thing, imagine every letter that the name of the Pelagornithidae was 1 foot, still not equivalent to that large prehistoric creature’s size.

These creatures were the dominant seabirds of most oceans at that moment, having a wingspan between 15-20 feet nearly 5-6 m.

3. Titanoboa

Source: Science Daily, Image: Wikipedia

At the same time, Titanoboa is the biggest, heaviest, and humanity knows the longest snake. This snake was so strong and crushed its enormous prey to death with huge force in the Paleocene Age, just after dinosaur extinction. The North-East Colombian species.

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4. Platybelodon

Source: Paleobiology, Image: Wikipedia

Its surname was ‘ shovel tusker, ‘ and Platybelodon appears as a modern elephant! But the distinction is one: its trunk.

These strange prehistoric beings didn’t have a typical trunk of flesh, but they were projected flat like a bill of a duck.

5. Eurypterid

Source: Quarterly Journal of the Geological Society of London, Image: Wikipedia

Now you can imagine an aggregate of two of humans’ biggest fears – alligators and scorpions; Eurypterid was like a scorpion which, from one found fossil, could reach the size of an alligator.

Primarily an ocean-dweller, this creature was not a true scorpion. The had found all over the world.

6. Pterodaustro

Source: The Illustrated Encyclopedia of Pterosaurs, Image: Wikipedia

Pterodaustro is one of the best-known pterosaurs something like flying reptiles. Discovered in South America, this animal notably used a thousand bristle-like teeth extruding from its lower jaw to filter plankton type foods and small crustaceans as it paddled through shallow pools.

7. Opabinia

Source: Philosophical Transactions of the Royal Society, Image: Wikipedia

Opabinia could feel you that it’s mad scientist’s invention. It’s not a dangerous predator but was an odd-looking prehistoric creature sporting a unique, vacuum hose-like attachment at its mouth which is used to bring food back to its mouth usually.

8. Meganeura

Source: Grzimek’s Animal Life Encyclopedia. 2nd Edition., Image: Wikimedia

Do you get fear when you see a bee? then you wouldn’t have fared too well in ancient times. Meganeura was ancient time’s massive dragonfly you can say.

With a tip-to-tip wingspan up to 2.5 feet almost 75 cm, they were big enough to gulp frogs and small amphibians easily.

9. Hallucigenia

Source: Nature, Image: Natural Math via Flickr

Here you can see one of the strangest ancient creatures and its name was Hallucigenia. At max 1.38 inches which is almost 3.5 cm long, they were originally constructed upside down and with its back and front converted when scientists first created models.

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10. Glyptodon

Source: The Field Guide to Prehistoric Life, Image: Wikipedia

Almost the size and the look of a VW Bug, the Glyptodon was an armadillo-like creature that looks like a tortoise. The Glyptodon was a vegan and, unlike turtles, could not retract its head but it had a  cap that is like a bone on its head.

11. Estemmenosuchus

Source: Prehistoric Wildlife, Image: Wikipedia

The name in Greek means “crowned crocodile,” Estemmenosuchus is a rather bizarre old creature. It appeared to be a hippo-rhino mixture, but on the sides of its head, this creature had a remarkable button like a horn.

12. Arctocyon

Source: Classification of Mammals Above the Species Level, Image: Wikipedia

You’re familiar with Capybara? These days, they didn’t consider as fear pets, but it was far from adorable and cuddly this old animal here we are talking about. They were called the “bear dog,” Arctocyon could walk along his hind legs with his razor-sharp teeth to tear away anything that fell into him.

13. Dunkleosteus

Source: Science News, Image: Wikimedia

This awful creature looked like a squished sardine, and Dunkleosteus is the most powerful morsel of any living or extinct animal! You could fit a person into a chomp on its mouth.  For 20 million years this weird old beast has ruled the sea.

14. Phorusrhacid

Source: Journal of Vertebrate Paleontology, Image: Wikipedia

You should know the features of this bird who couldn’t fly, and for Phorusrhacids, land speeds similar to ghettos could be reached. These animals could readily catch a medium-sized dog in their single bite, weighing it up to 1,000 pounds, which is almost 454 kg and 9 foot.

15. Elasmosaurus

Source: Sachs, S. “Redescription of Elasmosaurus platyurus” (2005), Image: Wikimedia

Did you saw the “whiplash (film)”? So you can imagine how hard a plesiosaur’s life was. Initially, Elasmosaurus was arranged in an incorrect manner with a body that was mostly neck: because of its brief neck and long tail.

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16. Helicoprion

Source: Journal of Paleontology, Image: Wikimedia

Helicoprion is the top place for the strangest prehistoric monster. Helicoprion has this list. It was a shark-like old fish with a special jaw. The reduced palate was a circular screw of teeth that could tear up the bone and grind the flesh to the top. Odd! Odd! Is it not? Is it not?

17. Edestus Giganteus

Edestus Giganteus
Source:, Image: Wikipedia

Edestus Giganteus was as awful as it was odd. You can tell “scissor-tooth shark” after seeing their look. Edestus Giganteus had a number of interesting chompers. Having fresh teeth and gums at the back of his mouth is moderate than replace his teeth.

18. Diprotodon Optatum

Diprotodon Optatum
Source: Science & Nature, BBC, Image: Yun Huang Yong via Flickr

Diprotodon Optatum is the biggest ever known marsupial. They were as large as a hippopotamus and like a wombat with sagger skin. During the Pleistocene, they resided in Australia and may have gone through our relatively close native ancestors.

19. Linhenykus

Source: Proceedings of the National Academy of Sciences, Image: Julius Csotonyi via Wikipedia

These days, if you have seen the movies of dinosaours they looked a bit like that but the strange thing was its finger. Linhenykus had only one diminutive finger on each of its arms. Scientists still aren’t sure the purpose, especially given its large paws.

20. Longisquama

Source: Paläontologische Zeitschrift, Image: Wikipedia

Longisquama is a lizard-like creature. Its primary look was like hockey sticks, which were longer than its whole body jutting out of its back. Paleontologists know little about this reptile discovered in Central Asia.

I write about new technologies, often hardware, equipment, and 3D technology, but sometimes mobile and in the cloud. I like to help owners and executives of small and medium enterprises to discover how to use these tools to grow their businesses. In the past, I have penciled the Wall Street Journal, Make, Sports Afield, Pittsburgh Business Times and many others.

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