Bolian

The Bolians are a species native to the planet Bolarus IX and members of the United Federation of Planets.

Physiology
The Bolians are characterized by their blue skin, which can range in color from vivid to pale from person to person. Some areas are accented by a darker blue, such as ridges along the tops of the head. They also have a bifurcated ridge running vertically along their heads, and some Bolians had earlobes reaching further down their head than other species. Male Bolians do not have hair and most female Bolians are bald as well. The Bolians have blue blood. (TNG, DS9, VOY)

History and Politics
By the 22nd century, the Bolians had limited contact with the Ferengi. (ENT: "Acquisition")

Sileon Thall and his followers attempted to persuade the Bolian government to ease the "cultural contamination" Bolian society was undergoing when Bolarus IX and the Federation started seriously talking about Federation membership. Sileon Thall and his followers either left or were expelled from Bolarus IX sometime between 2348 and when they founded New Bolarus around 2358.

In 2366, the Bolian government was maintaining an uneasy truce with the Moropa. (TNG: "Allegiance")


 * In a scene cut from "The Chase" (TNG), it was implied that the Bolians were not members of the Federation as of 2369. If they indeed joined after this date, it would explain the situation with Moropa, as it seems unlikely that one member world would exist in a state of altered political relations, being Federation members would substantially alter militaristic stance.

By the 24th century, the Bolians were associated with the Federation, with several officers serving in Starfleet in the 2360s and an active Federation ambassador by 2369. (TNG: "Conspiracy", DS9: "The Forsaken")

Bolian territory was a hotbed between the Federation and the Dominion during the Dominion War. A front was established by the Sixth Fleet in 2374 to prevent Dominion forces from taking the Bolarus system and outlying colonies. Starfleet developed a new strategy during the war on the Bolian front which was known as the Bolian Operation. (DS9: "Behind the Lines," "The Reckoning," "Penumbra")