The Flaxian ship was a type of starship employed by Flaxian assassin Retaya.
In 2371, Retaya was secretly hired by the Romulan Tal Shiar to poison Elim Garak. Garak having avoided this, bombed his own tailor shop. The Tal Shiar believed this had been Retaya's failure, so they sabotaged his warp core through a neutrino inversion, which later destroyed the starship, killing him. (DS9: "Improbable Cause")