The Hitac-Mothership was an Alien only available during the Hitac Event in September 2012, February 2013 and November 2013. These aliens were fairly large and inflicted massive damage upon any nearby ships. Each Hitac-Mothership had six Hitac-Minions attached to it, and was protected by an Insta-Shield, meaning only when the six Hitac-Minions were destroyed, could the Hitac-Mothership be destroyed.
The six minions and mothership combined together dealt a massive, and unseen damage from any other Aliens, of 90,000+. The mothership also had a new and unique ability to jump from map to map. It cycled around the Lower Maps, and first spawned in 3-4.