Valerian

The Valerians are a humanoid species who sell weapons and substances used to make weapons to the Cardassian Union.

During the Occupation of Bajor, the Valerians would supply the occupying forces on Bajor with weapons grade dolamide. Before arriving there, they would visit Fahleena III, Mariah IV and would have the dolamide purified at Ultima Thule.

In 2369, a Valerian ship docked at Deep Space 9. Kira Nerys wanted to turn them away, as she believed they were still carrying weapons for the Cardassians, although Benjamin Sisko told her she needed proof. After she was affected by the Saltah'na energy spheres, Kira attempted to board the Valerian ship. 

In 2376, Morn regaled a Valerian and two Rigelians in Quark's with stories of his travels.