G.E.L.F. or GELF is an acronym for Genetically Engineered LifeForm. It was used in two science fiction television programs, originally appearing in the BBC's cult sitcom Red Dwarf, and later on in the U.S. drama seaQuest DSV.
The concept of GELFs is explored in several episodes of Red Dwarf including "Polymorph" (1989), "Camille" (1991), "Psirens" (1993), "Emohawk: Polymorph II" (1993), and "Krysis" (2016). The writers of the series had stated early on in production that they did not want any aliens to exist in their show's universe; but as the series continued, in order to provide a stream of characters for the main crew to interact with, their cosmos was gradually populated with deranged robots and bizarre creatures that turned out to be the result of genetic engineering.
The Kinitawowi are bulky humanoids about six feet high covered in warts and shaggy dull orange/copper/brown fur similar to that of an orangutan. Their bodies are extremely tough; a direct blast of plasma from a bazookoid merely stunned a Kinitawowi at close range.
The Kinitawowi were originally bred as quartermasters aboard deep space starships. They lead a primitive tribal existence on various moons and asteroids. Their space is bordered by gigantic stone warning beacons that resemble skulls many miles across carved out of asteroids, seen in the series VI episode "Emohawk: Polymorph II" (1993). In the episode, second technician Arnold Rimmer (Chris Barrie) recalls from old space legends that unfortunate humans that unwittingly wandered into Kinitawowi space were often skinned alive to make beanbags. Nevertheless, as the 4000 Series service mechanoid Kryten (Robert Llewellyn) explains, the Kinitawowi were one of the friendlier tribes of humanoid GELFs and that they didn't always kill on sight as other humanoid GELFs apparently do. Indeed, not skinning strangers alive on sight was considered a warm greeting.