Some amoebas are parasitic. A common disease caused by amoebas is amoebic dysentery. It causes diarrhea. Amoeba Phylum Ciliophora Paramecium Paramecium are a freshwater genus that is free-living. They reproduce by conjugation.
Conjugation is when two different strains line up longitudinally and exchange nuclear material.
They can also reproduce by mitosis of the micronucleus and transverse fission of the macronucleus and cell body.