Iridoviridae is a family of large, double-stranded DNA viruses that primarily infect ectothermic animals, such as amphibians, fish, and some invertebrates. These viruses are known for causing significant diseases in their hosts, often leading to high mortality rates. The family includes several genera, with Chytridomycota and Lymphocystis being notable examples. Iridoviridae viruses can be transmitted through water or direct contact, and they can cause symptoms like swelling, discoloration, and lesions in infected animals. Understanding these viruses is crucial for managing wildlife health and conservation efforts.