Sludgegulpers, which existed in numerous models, were a type of aerial droid. These droids gained favor with pirates because they looked menacing and possessed the capability to seize control of starships by sticking to the exterior and corroding through the ship's structure. During the takeover of the Argo Moon, a vessel belonging to the Baobab Merchant Fleet, the Great Heep deployed several different sludgegulper configurations.