Which Dinosaur Had the Most Spikes?

The world of dinosaurs is as diverse as it is fascinating. From the towering herbivores to the ferocious carnivores, each dinosaur species had unique characteristics that set them apart. But among these prehistoric giants, a particular group stands out – the dinosaurs with spikes on their backs. These “spiked dinosaurs” are remarkable for their defensive adaptations and distinctive appearances.

When we think of dinosaurs with spiky backs, several names come to mind. However, determining which dinosaur had the most spikes isn’t as straightforward as it might seem. The number of spikes varies significantly among different species, and our understanding of these creatures continues to evolve as more fossils are discovered.

The Spiky Back Dinosaur Contenders

Among the dinosaurs known for their back spikes, the Stegosaurus, Kentrosaurus, and Spinosaurus are perhaps the most iconic.


The Stegosaurus is often the first dinosaur that comes to mind when we talk about a ‘dino with spikes.’ This vegetarian dinosaur had two rows of large, bony plates along its back, culminating in four long, sharp spikes on its tail. While these aren’t technically ‘back spikes,’ they were a crucial part of the Stegosaurus’s defense mechanism.


Another dinosaur with spikes down its back is the Kentrosaurus. Smaller than the Stegosaurus but no less formidable, the Kentrosaurus boasted two rows of spikes running from its neck to halfway down its tail. Unlike the Stegosaurus, whose back was adorned with plates, the Kentrosaurus’s spikes were more prominent and numerous.


The Spinosaurus, while not typically associated with ‘back spikes,’ had a unique feature that sets it apart. This dinosaur had a sail-like structure on its back, supported by long, spiky bones. While these aren’t ‘spikes’ in the traditional sense, they certainly contribute to the Spinosaurus’s distinctive silhouette.

So, Which Dinosaur Had the Most Spikes?

While the Stegosaurus, Kentrosaurus, and Spinosaurus are all strong contenders, the title of the ‘dinosaur with the most spikes’ goes to a less-known species – the Gigantspinosaurus. Despite its name suggesting a kinship with the Spinosaurus, the Gigantspinosaurus was actually more closely related to the Stegosaurus.

The Gigantspinosaurus had two enormous spikes jutting out from its shoulders, along with two rows of smaller spikes running down its back and tail. These spikes served as an excellent defense mechanism against predators. The exact number of spikes varies among individual specimens, but some fossils suggest that the Gigantspinosaurus could have had up to 50 or more spikes, earning it the title of the ‘dinosaur with the most spikes.’

Other Notable Dinosaurs with Spikes

Aside from the top contenders, several other dinosaurs boasted impressive spikes. For instance, the Stygimoloch is known for its horn-like projections at the back of its head. While these aren’t back spikes per se, they’re worth mentioning due to their distinctiveness.

Another dinosaur worth noting is the Ankylosaurus, famous for its heavily armored body and large club-like structure at the end of its tail. While it didn’t have traditional ‘back spikes,’ its entire back was covered in bony protrusions that served a similar defensive purpose.


The world of dinosaurs is full of fascinating adaptations, and back spikes are among the most intriguing. From the iconic Stegosaurus to the lesser-known Gigantspinosaurus, these prehistoric creatures showcase the diversity and adaptability of life on Earth millions of years ago. So, while the Gigantspinosaurus takes the title of the ‘dinosaur with the most spikes,’ each spiky back dinosaur holds a unique place in our understanding of these remarkable creatures.

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