Copepods in cultivation systems may be exposed to environmental conditions (e.g., fluctuations in temperature and pH, or pathogens) that challenge successful large-scaleproduction. It is, therefore, essential that copepod species chosenas live feed show high resistance to such conditions. While it isfeasible to keep physical and chemical conditions relatively sta-ble in indoor, intensive system, this may be less straightforward inextensive and larger, outdoor production systems. Epibiotic bacte-ria, protozoans, and algae may appear on copepods in both types ofsystems.