Reproduction occurs in the spring, with eggs being laid in shallow depressions at the bottom of calm areas of water, usually surrounded by vegetation, or among plant roots. Though little is known about their courtship, it is believed to be quite violent, as many specimens collected have scarring from healed bite marks from other sirens. About 12-300 eggs are laid at a time, and several clutches may be laid over the course of the year. Hatchlings are only about 0.4 in (1.1 cm) in length, but grow quickly. Maturity is reached in three to four years.