Known as one of the Hellerium mutants which can survive outside of a Zone for the longest. They usually eat various biological detritus, containing inert Hellerium from general fallout and biosphere circulation. However, when they're hungry (which is most of the time when outside of a Zone), a strong smell of Hellerium (such as our craft would always have) drives them into feeding frenzy, in which they don't hesitate to attack anything that moves.