Biography Information
True Identity Jeffrey
Homeworld Earth (Adoptive)
Species Unknown
Gender Male
Length 200 meters
Hair Color None
Eye Color Black
Diet Lithotroph
Language capable of learning
Abilities Superhuman Stength
Superhuman Durability
Sharp Teeth
Status Deceased
Behind the Scenes
Universe Men in Black Universe
Appearances Men In Black II (first appearance; death)
Jeff is a 200 meters long, worm-like alien living in abandoned subway lines on New York City. The name of his species has never been revealed. He has an elongated body with no visible appendages; a large, four-mandibled mouth filled with thousands of sharp teeth; a pair of small eyes and a short, flower-mimicking antenna.

Jeff is most likely lithotrophic as it has been mentioned that he eats inorganic garbage and he was seen biting off half of a subway train.

Jeff is one of the many extraterrestrials whose existence is kept in secret by the Men in Black. Zed mentioned that he remembers when Jeff was as small as a regular Earth worm, implying that Jeff may have been born on Earth, or lived on it for most of his life.

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