See text Fiersviridae is a family of positive-strand RNA viruses which infect prokaryotes.

[2] They are small viruses with linear, positive-sense, single-stranded RNA genomes that encode four proteins.

All phages of this family require bacterial pili to attach to and infect cells.

[2][5] Viruses in Fiersviridae are non-enveloped, with icosahedral and spherical geometries, and T=3 symmetry.

The virus exits the host cell by bacteria lysis.