Sea Urchins are typically spiny, globular animals, echinoderms in the class Echinoidea. The Sea Urchin is found across the ocean floors worldwide, but rarely in the colder, polar regions.
Sea Urchins are commonly found along the rocky ocean floor in both shallow and deeper water and are also commonly found inhabiting coral reefs. There are nearly 200 different species of recognized Sea Urchins, that come in all shapes and sizes. Some Sea Urchins are covered in long thin spikes whereas others have a hard shell that is made up of chalky plates. The Red Sea Urchin is the longest-living creature on Earth, with some living more than 200 years. Sea Urchins are omnivorous animals and therefore eat both plant and animal matter.