Mithran class

From Memory Alpha, the free Star Trek reference.

The Mithran-class was an advanced fighter being developed by the Benthan people.

The Mithran-class fighter was outfitted with a coaxial warp drive, allowing it to travel great distances instantaneously.

Steth, a lifeform capable of taking over humanoid bodies, told Tom Paris about this ship when he invited Paris to come with him and test-pilot the ship. (VOY: "Vis à Vis")

Much of what Steth said turned out to be false, so it is possible he made this ship up.