What is an animal covered in spines?

There are many animals covered in spines! To give you a more specific answer, I need more information. Could you tell me:

* What kind of animal are you thinking of? Is it a mammal, a reptile, a fish, an insect, or something else?

* Where does this animal live? Is it in the ocean, a forest, a desert, or somewhere else?

* What is the purpose of the spines? Are they for defense, camouflage, or something else?

Once I have more information, I can give you a more accurate answer!