Ectozoan is a technical term that describes an external parasite that lives on the surface of its host. Synonyms for this word include ectoparasite, external parasite, and epizoon. Other related terms include arthropod, insect, and mite, which are all types of ectozoans. Additionally, there are many specific types of ectoparasites such as fleas, ticks, lice, and bed bugs. These parasites can cause a variety of health problems for their hosts including skin irritation, disease transmission, and anemia. It is important to control ectoparasites in order to maintain the health and well-being of both pets and humans.