This is called the Oniscidae. You may find them under a brick or a damp object. You may have felt disgusted and wondered why they exist in nature. Well, let me tell you, the Oniscidae, better known as cochineal, is a subgroup of isopod crustaceans whose function is to remove harmful heavy metals from the earth such as mercury, cadmium, and lead. They contribute to the cleansing of soil and groundwater to reaffirm the wisdom of nature. Do not damage them or spray pesticides! Many people do not know that pill bugs are edible. Not only are they edible but from my experience some of them do in fact taste similar to shrimp. Any bug should be cooked before being eaten, but some people eat them raw. They make a great sauce, or they can be added to soup.