A race of beautiful, long-lived women in the Taurean system who lure passing starships every twenty-seven years and feed on the life energy of their male crews.
The Taureans appear in the animated episode The Lorelei Signal. Their ancestors settled the second planet of the Taurean system, where something in the environment drained humanoid vitality. The women developed a means of controlling male minds and drawing off their life force, which kept them young indefinitely but left them unable to bear children or to leave.
Every twenty-seven years a signal draws a ship to the planet. When the Enterprise answers, Kirk, Spock, McCoy and the other men fall under its spell and begin to age rapidly as the headbands they are given drain them.
Uhura takes command and leads an all-female security team to the rescue, and the transporter restores the victims. The Taurean leader Theela agrees to give up the old ways, and the women are to be resettled on another world.