A trading species who supplied weapons-grade dolamide to the Cardassians during the Occupation of Bajor, and whose transport Sherval Das set off a dispute on Deep Space 9 in 2369.
The Valerians are a spacefaring species known to Bajor chiefly as arms suppliers. Throughout the Occupation they delivered extremely pure, weapons-grade dolamide to the Cardassian military.
They feature in the Deep Space Nine episode Dramatis Personae. When the Valerian transport Sherval Das asks to dock, Kira wants it turned away or searched, convinced that the trade is continuing. She has traced the ships' regular route through Fahleena III, Mariah IV and Ultima Thule, where she believes the dolamide is purified. Sisko insists on proof before the Federation acts.
The disagreement is inflamed by a telepathic matrix from a dead Gamma Quadrant culture, which turns the senior staff against one another and pushes Kira towards mutiny. No Valerian is seen on screen.