The creature was encountered by the Canaries (the prisoner suicide squad that were sent out on missions from The Tank on Floor 13 of Red Dwarf), on-board an unnamed Space Corps derelict spacecraft. The creature was imposing, with three heads and tentacles, but took "one look" at Kill Crazy and ran off. It is implied that Kill Crazy's body odour scared the creature off.
Given that Kochanski sarcastically says that it was the least enjoyable suicide mission that she's even been on, it is likely that Kill Crazy was determined to kill it, and did so after some effort. ("Krytie TV", Series VIII)
- The three heads may be a reference to the mutated astro the boys from the Dwarf encountered on the DNA Ship in Series IV.