There are over 2000 species of cacti over the world! Most of these are succulents and have thorns or plant hair. Even though we are accustomed to seeing pictures of cacti in hot sandy deserts, cacti can also grow in coastal regions. Cacti do not have many purposes and are mostly cultivated for their beauty. Only a few are cultivated for eating or medicinal purposes. If you ever have a cactus needle prickle you, the easiest way to get it out is either by tweezers (for bigger needles) or duct tape (for smaller needles).