- You may also be looking for the Swarm species or the episode "The Swarm".
A swarm was a gathering of animals (usually insects) in one location. They could occur for many reasons, such as for defense if they felt threatened. The term could also be applied to any gathering of starships, other artificial objects or an astronomical event similar to animal swarming.
In 2268, Nilz Baris described the twelve Klingons who came aboard Deep Space K-7 as a swarm, although Captain Kirk did not believe "that twelve Klingons constitutes a swarm". (TOS: "The Trouble with Tribbles"; DS9: "Trials and Tribble-ations")
In 2370, Natima Lang claimed her Cardassian shuttle had been caught in a meteor swarm, but the damage had actually been caused by weapons fire. (DS9: "Profit and Loss")
In a pagh'tem'far experienced by Benjamin Sisko in 2373, he saw a swarm of locusts in the skies above Bajor. (DS9: "Rapture")
Jadzia Dax and Miles O'Brien programmed the self-replicating mines to swarm detonate if a ship approached them. (DS9: "Call to Arms")