Sirens are quite distinct from other salamanders, and genetic analysis confirms that sirens are not closely related to other salamander groups.

 

Sirens are generally eel-like in form, with two tiny forelimbs. Their size ranges from 9.8–37 in.  The adult siren has fully-developed gills.  They are able to cross land on rainy nights.

Sirens feed mainly on worms, small snails, shrimps, and algae.

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They are also able to burrow into the mud of drying ponds and encase themselves with a cocoon of mucus to survive periods of drought.