In Namco’s 1981 arcade game Galaga, the enemy that can capture the player’s fighter is called Boss Galaga.
Boss Galaga is a larger insect-like enemy that can use a tractor beam to seize a fighter. If the player destroys the Boss Galaga while the captured ship is still present, the rescued fighter joins the active ship, creating a dual-fighter arrangement with increased firepower.
Galaga was developed as a sequel to Galaxian, but it added more complex formations, dive attacks, and the capture mechanic. Players sometimes call the enemy simply a boss, but Boss Galaga is the specific in-game name generally used for the tractor-beam carrier. The rescue feature is one of the game’s most memorable strategic risks.