Tholian ships were small starships of characteristic shape, utilized by the Tholian Assembly during the 23rd century. These vessels were armed with plasma torpedo like weaponry. But their most powerful weapon was the so-called "Tholian Web". This web was "woven" by two or more vessels around an enemy ship. This web could be used as a high power immobilization field/tractor beam to pull captured starships back to Tholian territory.