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Gwoemul is the main antagonist of the 2006 South Korean horror film The Host.

A fish-like creature mutated by formaldehyde pollution and host to a deadly virus emerged from the Han River one day and kidnapped young Hyun-seo, leading her distraught father Park Gang-du to track down the beast.


Gwoemul is a 35-40 foot green creature with wet scaly skin. It is shaped roughly like a tadpole with a long thin tail. Its jaw opens up in multiple parts and it has two clawed arms on which it can walk.

Powers and Abilities

Gwoemul possesses the following powers and abilities:

  • Sharp teeth
  • Fast swimming
  • Amphibious locomotion
  • Prehensile tail
  • Viral infection


Gwoemul is killed after Gang-du impales it with a metal pole.


  • The monster's name loosely translates to "monster" in Korean.

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