Definition
The genus *Siren* is a group of aquatic salamanders within the family Sirenidae. These salamanders are characterized by their elongated, eel-like bodies and the presence of only front limbs. They lack hind limbs and pelvic girdles. *Siren* species retain external gills throughout their lives. They are found in freshwater habitats in the southeastern United States and northeastern Mexico. The genus name highlights a key branch within the Sirenidae family.