| Such sporozoan infections are usually unresponsive to treatment and diseased fish should be removed from the tank. |
| They are generally placed in the sporozoan class Toxoplasmea, although they may more properly be classed as coccidian parasites under the order Eucoccidia. |
| Haplosporidian, any protozoan of the sporozoan subclass Haplosporea. |
| By far the most common sporozoan intestinal parasite is Cryptosporidium parvum. |
| Plasmodium, a genus of parasitic protozoans of the sporozoan subclass Coccidia that are the causative organisms of malaria. |
| Others suffer more or less from the attacks of various sporozoan parasites. |
