| In Penaeus the nauplius changes to metanauplius which is followed by protozoa, zoaea and mysis stages before adult form is reached. |
| Fungi and protozoa may be observed but the light microscope's low magnification does not provide detailed resolution of fungi and protists. |
| If the source of contamination is animal waste or effluent from septic tanks, bacteria, viruses, and protozoa may also be present. |
| There are a few parasites of the black crappie, which include many protozoa, trematodes, cestodes, and nematodes. |
| The normal microbiota in this anoxic environment are composed of bacteria, ciliate and flagellate protozoa, and anaerobic chytridiomycete fungi. |
| Microbiological contaminants, including protozoa, bacteria and viruses, are normally killed by chlorinating and other treatment. |
