Spikes, spikes, and more spikes
These guys had spikes on their back, spikes on their tails, and for some, even on their bodies! They had blood vessels in their spines which could make them turn colors. Usually they have 4 spikes on their tails to defend of predators. Did you know that their brains were smaller than a peanut? The most popular Stegosaur is Stegosaurus.