Siren

Siren, a genus of tailed Amphibians, represented by one species—Siren lacertina—living in swamps in the southern states of North America. The animal is eel-like, of a dark lead colour, one to two feet long, without hind-limbs, with four-toed weak fore-limbs, with three pairs of persistent external gills, with no teeth except on a small patch on the roof of the mouth. The food seems to consist of worms and insects.