10 animals that turn their bodies into natural weapons with shells, thorns, and spikes, and where to find them

In the wild, it’s either to eat or be eaten. It’s the game of survival for the fittest. And since every creature has a distinct defence mechanism, it’s interesting to note how evolution has played a role in helping them develop tactics to survive and play their part in the ecological system. Likewise, there are some fascinating animals in the wild that come equipped with nature’s finest defense systems, like hard shells and sharp thorns. These naturally armoured animals use their armour to serve as shields against predators—and sometimes as weapons, too. If you knew only about the pangolin and the porcupines, here are some incredible creatures that carry their own armor or grow their own spikes, and where in the world you can spot them.

Don’t be fooled if you see this one in the wild. It’s elusive, a shy, scale-covered mammal that could pass for a walking pine cone. Covered head to tail in tough armor, it has a genius trick under its sleeves: when danger strikes, it curls into a tight, spiky ball that’s nearly impossible to bite through. You’ll find these elusive night-crawlers rustling through the forests and grasslands of India, Southeast Asia, and Africa.

Porcupines might seem harmless from afar, but not to be messed with. Covered in sharp, detachable quills, these spiky rodents know how to keep predators at bay, and that too painfully. The Old World porcupines strut around Africa, Europe, and Asia, whereas the New World ones stick to North and South America.

With its spiky armor, the sea urchin looks like something straight out of a battle. These little underwater creatures are covered in long, movable spines and lurk quietly on rocky seabeds and coral reefs. They can be found from the Pacific Ocean to the Mediterranean.

This mammal can be identified from their bony, armour-like shells. Found in South America and the southern US, they are the only mammals that come wrapped with this type of shell. And when danger strikes? It rolls into a tight, armored ball, giving predators a tough fight.

One look at the thorny devil, and you'd think evolution has played its part. Commonly known as the mountain devil, this species is endemic to Australia. It comes covered in spikes from head to tail, and also has a false head on its back. The thorny devil is armed with hard, sharp spines that make it tough for predators to swallow it.

These ancient creatures are more closely related to spiders than crabs. They have a domed, horseshoe-shaped shell and a long, pointed tail called a telson. Commonly found along the Atlantic coast of North America and Southeast Asia, they’ve barely changed in 450 million years.

Tiny but dramatic, these spiders have brightly colored, hard, spiked abdomens that look like mini shields. They weave intricate webs in tropical regions across Asia, Africa, Australia, and the Americas.

Think of the echidna as a spiny ant-eater. This egg-laying mammal is covered in coarse hair and sharp spines for defense. When threatened, it burrows into the ground or curls up, leaving only its spikes exposed.

These land-dwelling turtles carry a high-domed shell that acts like a locked fortress. Found in the US and parts of Southeast Asia, box turtles can retract fully into their shell, sealing themselves off from danger with a hinged lower shell.

This large starfish looks beautiful, but its long, venomous spines make it one of the reef’s most feared inhabitants. Found in the Indian and Pacific Oceans, especially on the Great Barrier Reef, it feeds on coral and is considered a threat to reef health when populations boom.