Mites are crab-like external parasites that live on and inside of the skin, pores, hair follicles and hair coats of dogs, cats and many other mammals. The adult mites that infest dogs are tiny and have transparent to semitransparent bodies. Both of these characteristics distinguish them from ticks, which are larger and darker in color. In fact, Mites are so small that they cannot be seen with the naked eye, and can only be seen and accurately identified under a microscope. They typically range in size somewhere in the few hundreds of micromillimeters. To get some idea of how tiny these parasites are, one micromillimeter equals one-thousandth of a millimeter, and a millimeter is equivalent to 0.039 of an inch.