Beautiful girls, usually naked, with fishtail in stead of legs. They have long amber colored hair adorned with crowns of flowers.
They are guardians of seawater and fish, they can bewitch with their beauty and their songs.
Mermaids are fierce enemies of young and handsome fisherman. As soon as nets are out, they may sing and attract gentelman to the deep sea. Many have gone in their lightheadedness and most have lost thir breaths in the arms of mermaids.
Undinės used to get a sacrifice of one fish of every race one cought annually. People used to pray to them to spare the young men.