Ciliognathus

Ciliognathus is a ciliated organism that has an oral groove-like horizontal jaw, which helps it consume smaller cells. It also has the option to filter edible particles.

It reproduces by binary fission, but in certain conditions, like overcrowding and environmental stress, it undergoes a sexually reproductive process called conjugation. It lines up with another Ciliognathus and they fuse together. They then exchange genetic material. The two Ciliognathus detach. The two become four new cells. Paramecia reproduce this way for the same reasons.