The Orions were a warp-capable humanoid species from the Alpha Quadrant. This species originated from the planet Orion in the Orion system.
Orions were known for their distinctive green or blue skin. Orion males were typically bald and, on average, taller and more muscular than the average Human male. Orion females were very animalistic in nature, known for their extreme carnal appetites and their innate skill of seduction. A Human male could rarely resist the alluring dance of the Orion slave girl.
In Orion society, the males were slaves to the females. As a means of deceiving other species, the Orions maintained the facade that the females were the slaves. This was commonly done by selling Orion females on the Orion slave market.
Orion once harbored a highly advanced civilization whose history had drawn great interest from Federation historians and archaeologists alike. During the mid-23rd century, noted Federation archaeologist Doctor Roger Korby translated medical records from the Orion ruins that helped revolutionize modern immunization techniques and became required reading at Starfleet Academy. In 2269, through the assistance of the Guardian of Forever, Starfleet officers Captain James T. Kirk, Commander Spock, and historian Lieutenant Erickson traveled to the dawn of Orion's civilization to view the planet's history unfolding, firsthand.