Vidiian

Vidiian is a fictional alien species from the Star Trek universe, specifically appearing in the Star Trek: The Next Generation series. They are a silicon-based lifeform, which means their biology is fundamentally different from carbon-based lifeforms like humans. This silicon-based nature is a key characteristic that sets them apart.

The Vidiian species is characterized by a widespread, degenerative disease known as the Vidiian plague. This affliction causes their tissues to break down, leading to a constant need for organ transplantation. As a result, Vidiian society has developed advanced medical technology, particularly in the field of organ harvesting and transplantation. They often acquire organs from other species, sometimes through ethically questionable means, due to their desperate need.

Vidiian society is structured around their struggle against the plague. They are often depicted as pragmatic and survival-oriented, driven by the necessity to find cures or viable organs. Their appearance is also distinctive, often described as looking somewhat reptilian or insectoid, reflecting their non-carbon-based physiology. Despite their medical advancements, the plague remains a persistent threat, shaping their culture and interactions with other galactic civilizations. They have been known to be both hostile and cooperative depending on the circumstances and their immediate needs.