The Serosians were warp-capable inhabitants of the planet Seros in the Delta Quadrant. An organic species, they were known for their slovenly carnal pleasures, as well as for sleeping and reading. They used holographic technology and created sentient holograms to act as cleaners and maintenance personnel aboard their starships. Unfortunately, while these programs, referred to as isomorphs, were given individuality to the point where each was given their own name, they were not well-treated by their creators, who viewed them as little more than tools.