Mites are tiny, often microscopic, arthropods. Like ticks, mites are in the scientific order Acari. There are many mite species, but it can be challenging to tell the difference between each species because they are so small. Some mites are parasites of plants or animals. Other mite species eat mold or other decaying organic matter. Certain mites are important to the environment as decomposers while others, like house dust mites, are notorious pests.
Often, a microscope is needed to see a mite. Mites do not have anntenae or distinctive body regions. They look oval with tiny "heads" and eight legs.