'Zorg's are an alien species in the Spaceman Spiff universe that comes in different shapes and sizes.
A small Zorg was encountered by Spaceman Spiff in an early strip at the end of the 1/13 trough 1/18 1986 story arc. In it, the Zorg was a counterpart of Principal Spittle.
A giant Zorg was encountered by Spaceman Spiff in a Sunday strip. In it, Spaceman Spiff is exploring Planet Bog (it is unknown if he crashed or landed of his own free will), when a terrible rumble informs him that a Zorg is present. The Zorg leaves him no chance of escape, and once captured, Spaceman Spiff is taken to the creature's lair to be cooked alive.