Tholian
In the Star Trek fictional universe, Tholians are a fictional starfaring and extremely territorial race. The Tholian /ˈθoʊliən/ home nation is the Territorial Annex of the Tholian Assembly, which inhabits an area of space in the Alpha Quadrant, near the Cardassian Union and the Badlands.
The Tholian Assembly is located in a region of space bordering the southern parts of the Klingon Empire and the United Federation of Planets. Tholia, their homeworld, is a Class c planet.
Read more about Tholian: Tholian Biology and Culture, Tholian Technology, Tholian History, The Mirror Universe