Wisp's ship

From Memory Alpha, the free Star Trek reference

The Wisp's ship was a starship inhabited non-corporeal beings who were described as "Wisps" by the crew of Enterprise during their encounter in 2152, approximately 150 light years from Earth.

The ship, which resembles a heavily-textured blue-grey manta ray, with a blunt lobed tail, had a forward, ovoid hatch that splits into several pocketed sections; the surrounding hull forms a pronounced ventral "sill" with two projecting spines.

This ship was capable of traveling at at least warp 6, yet emitted no perceptible-to-Enterprise warp signature. During Enterprise's encounter with the vessel, they were unable to identify its hull composition, nor a transceiver. The ship is stated to be at least 500 meters wide. It had the ability to neutralize Enterprise's phase cannons, and spatial torpedoes, as well as, warp and impulse engines after it had taken the ship into its bay. Once inside, Enterprise's sensors were unable to penetrate the hull to determine whether or not they were still at warp.

The interior bay of the ship was blue in color, basically rectangular, with many curved ribs on the side bulkheads, and curved details that may indicate an irregular deck, or interior features beneath a translucent surface. The initial atmosphere was mostly helium and trace amounts of xenon.

The "Wisps" who inhabited the ship were said to live in subspace, yet relied on the ship so as to not be exposed to normal space, which they could not normally inhabit.

After several of the Enterprise's crew had underwent the "crossing" with the "Wisps", it was eventually determined that their ship was deteriorating, and they had no way to repair it. Since they couldn't survive in space, to save themselves, 82 of the "hundreds" aboard decided to make the "crossing" and take over the bodies of each of the crewmen on Enterprise, while the rest were going to try to find another vessel of corporeal beings.

Unfortunately, their plan failed, and Enterprise was able to release the possessed crew members of the "Wisps", before firing two spatial torpedoes into the opening of the "Wisps" ship, destroying it and allowing Enterprise to escape. (ENT: "The Crossing")