The Tarahongians were a warp-capable species.
In the mid-24th century, Quark and his cousin Barbo sold defective warp cores to their government. Quark informed the Tarahongians and Barbo was imprisoned in a Tarahong detention center. They released him in 2369. (DS9: "The Nagus")
This species was only mentioned in dialogue.
According to StarTrek.com
, the Tarahongians were from the planet
Tarahong (pronounced "tair-uh-HAWG").