Caudovirales is an order of viruses known for their distinct structure, which includes a head and a tail. These viruses primarily infect bacteria, making them a type of bacteriophage. They are characterized by their double-stranded DNA genomes and are important in regulating bacterial populations in various environments. Members of the Caudovirales order are classified into three families: Myoviridae, Siphoviridae, and Podoviridae. Each family has unique features, such as tail length and morphology. These viruses play a crucial role in biotechnology and microbiology, offering potential applications in phage therapy and genetic engineering.