Suliban cell ships surround Enterprise.
Suliban cell ships were the primary ship types used by the Suliban Cabal during the mid-22nd century. It was armed with some sort of particle weapon and equipped with a cloaking device.
Cell ships of at least two different types have been observed; one is a one-man fighter about twice the size of an NX-class starship's shuttlepods. There is also a much larger but less common version that is additionally equipped with a tractor beam. Both kinds of cell ships can combine to create a larger structure, such as a helix; they can also connect to a salvage ship.
The NX-01 Enterprise captured a small cell ship while attempting to rescue Klaang the Klingon in April 2151. (ENT: "Broken Bow") Commander Charles Tucker III spent months studying the ship, especially its cloak, with very little success. In 2152 the captured ship was used to mount a rescue mission on a prewarp planet. (ENT: "The Communicator")