What Is A Scariest Extinct Shark?

Sharks have been swimming in the sea for more than 400 million years, and they have evolved into some of the scariest predators in history. While the Great White and Megalodon are famous for being terrifying, some of their extinct cousins were even more frightening. This article explores the most bone-chilling extinct sharks that lived in prehistoric oceans.

Helicoprion: The Shark with a Deadly Spiral Arrangement

Let’s start with Helicoprion. This shark lived a long time ago, about 290 to 250 million years ago. Instead of separate teeth, it had teeth arranged in a spiral inside its lower jaw, which sliced through its prey with ruthless efficiency.

Megalodon: The Colossal Shark with Giant Teeth

Next up is the Megalodon, probably the most famous extinct shark. It lived a long time ago, from 23 to 3.6 million years ago, and was one of the largest sharks ever, measuring up to 60 feet long. With teeth over 7 inches long, Megalodon could swallow an adult human whole, which is really scary!

Dunkleosteus: The Armored Fish with Crushing Jaws

Moving on to Dunkleosteus, it wasn’t a shark, but it was still a terrifying predator. It lived about 358 to 382 million years ago and was an armored fish. Its jaws were lined with sharp bony plates that could easily crush the shells of other marine creatures.

Stethacanthus: The Fish with Guillotine Fins

Stethacanthus was another extinct shark that lived around 358 to 299 million years ago. Its dorsal fin was shaped like an anvil and covered in sharp denticles, making it one of the most unique and frightening creatures of its time. The shark used this fin to attract mates or intimidate rivals.

Helicampdos: The Fish with Chainsaw Teeth

Finally, we have Helicampodus, a small extinct shark that lived about 252 to 247 million years ago. Its saw-like teeth were arranged in a row like a chainsaw, which helped it slice through the flesh of its prey. Despite being only two feet long, it was one of the most efficient predators of its time.


To sum up, while modern-day sharks are scary enough, their extinct cousins were even more terrifying. From the unusual tooth arrangements of Helicoprion and Helicampodus to the massive size of Megalodon and the armored jaws of Dunkleosteus, these creatures continue to fascinate and scare us. Although we will never come face to face with these beasts, their fossils remind us that the ocean is still full of mysteries and dangers.