The Graknil was a pig-like alien encountered by Spaceman Spiff on planet Zorg.
The Graknil has the head of a pig, a forked tongue and no ears. Its body is green with yellow spots, and shaped like a simple circle with tentacles.
Spiff was cornered between a rock (his desk) and a hungry Graknil (Miss Wormwood). He drew his Atomic Napalm Neutralizer. It simply bruised the Graknil and Spiff made a run for it, and ducked into a cave (teacher's lounge). He found himself surrounded by monsters (teachers), but escaped unhurt.