An Etharan starship was a type of vessel utilized by the Entharan arms merchant named Kovin. The vessel was equipped with various offensive and defensive armaments, including photon pulse weapons, and photonic pulse emitters.
Kovin used such a ship to try and escape the USS Voyager in 2374. While he was able to nearly disable Voyager, he was eventually destroyed himself when he shunted all his power to his photonic emitters, causing a overload. (VOY: "Retrospect")