Three Night alien ships
The Night alien ship was a starship operated by the Night Aliens in the 24th century in a Delta Quadrant region called the Void.
In 2375 the USS Voyager under the command of Captain Kathryn Janeway made First Contact with the species after they had been boarded by seventeen of them. Tuvok modified a photon torpedo to use it as a light source and discovered three of these ships surrounding the Voyager.
After Captain Janeway and a wounded alien made a "peace treaty" and the alien was beamed back aboard one of the ships, the Voyager went to a spatial vortex nearby which was used by the Malon Emck, to destroy it. The Malon used the Void as a garbage dump for their contaminated antimatter which caused theta radiation poisoning to the night aliens.
While heading to the vortex the Malon export vessel tried to stop the Voyager but was attacked by several night alien ships which fired explosives. (VOY: "Night")