First Appearance: "THE THOLIAN WEB"
Physical Attributes: Tholians possess both male and female characteristics, and their eight-limbed bodies have a crystalline structure and exoskeleton. Tholians live in an ambient temperature of 480 Kelvin.
The Tholian Assembly is an interstellar power bordering the United Federation of Planets. Tholians frequently annex systems outside their core territory.
In the Twenty-second Century, the Vulcan High Command had limited contact with them.
In the Twenty-third Century, Tholian ships were capable of creating energy fields woven with filaments from their ships, which act as a tractor net to surround and capture enemy ships.
Tholians are extremely xenophobic. They are renowned for their punctuality, and do not like deception.
The inside of Tholian ships is over 200 degrees, and they are believed to be a non-humanoid species.