Gasbags are one of the smaller members of the Corrupted. They have a large sac of a highly unstable explosive liquid on their head. Their breathing patterns tend to be quite loud. This can be used to an advantage, in that it can be used to identify their location before they can be seen. If blown up their heads can be seen, with just very low green-shining eyes and mouth, their neck is fat with lines of low green light.
Gasbags are suicidal. They storm into their targets, and upon doing so, their heads promptly explode. This causes instant death for the creatures.
Blasts can stun the Gasbags, however the easiest way to kill them is to blast the sac, resulting in a one hit kill.