The scientific name for sporozoans is Apicomplexa.

By reproducing

Sporozoans are harmful in that they are parasitic in nature. Sporozoan sometimes do not impair the host, or it can cause epidemic in a short period of time. Sporozoans create a capsule called a spore around its contents and that makes it hard to kill.

Sporozoa have no organelles for movement.

parasitic, nonmotile protozoans, many of which reproduce by the production of spores. Sporozoans are protozoa, or protozoans, that have no organelles for transportation. A plasmodium is a protozoan. Most sporozoans are parasites.