The S'Sleen natives were an intelligent civilization of non-humanoid lifeforms native to the planet S'Sleen, located in the Beta Virgilis star system somewhere in the space of the galaxy's Alpha or Beta Quadrants. In the 23rd century, the S'Sleen natives were deemed unready for first contact by the Federation, and their world was placed under Prime Directive protection. In the 2280s decade, around reference stardate 2/2306.01, the S'Sleen civilization numbered about 1 billion individuals. (FASA RPG module: The Federation)