What animals use binary fission to reproduce?

Binary fission is a form of asexual reproduction primarily used by unicellular organisms. Common examples include bacteria, such as Escherichia coli, and some protozoa, like amoebas. In this process, the organism duplicates its genetic material and divides into two identical daughter cells. While it is mainly observed in single-celled organisms, some multicellular organisms, like certain types of flatworms, can also reproduce through similar mechanisms.