Siren
n.
Any long, slender amphibian of the genus Siren or family
Sirenidae, destitute of hind legs and pelvis, and having permanent
external gills as well as lungs. They inhabit the swamps, lagoons, and
ditches of the Southern United States. The more common species (Siren
lacertina) is dull lead-gray in color, and becames two feet long.