The Talvath was a Romulan science vessel in operation in the mid-24th century. The Talvath, operating under the direction of the Dr. Telek R'Mor of the Romulan Astrophysical Academy, began an extended scientific mission, beginning in early 2350.
In 2351, the Talvath encountered a micro-wormhole in Sector 1385 of the Alpha Quadrant that lead to the discovery of the USS Voyager in the Delta Quadrant, located in the year 2371. (VOY: "Eye of the Needle")