Gwoemul

Year: 2006
Aka: The Host
Director: Bong Joon Ho
Cast: Song Kang-ho, Byun Hee-bong, Park Hae-il, Bae Doona
IMDb: tt0468492
Audience score: 8.023
A teenage girl is captured by a giant mutated squid-like creature that appears from Seoul's Han River after toxic waste was dumped in it, prompting her family into a frantic search for her.