 Previous studies indicate that species in genus "Hematodium" affect many organisms in Order Decapoda, and may also affect Order Amphipoda and subclass Copepoda (Manier "et al", 1971).These crustacean taxa include crabs, lobsters, crayfish, prawns, and shrimp – all commercially important food sources for many countries.The effects of "Hematodinium" parasites are aggressive and can be lethal, thus capable of eradicating entire crab populations.