The Host 2006

Chemicals dumped into the Han River from a U.S. military base create a mutant creature. One day, the thing emerges from the water and starts eating passers-by. The pre-teen daughter of dimwit Seoul snack vendor Gang-du is abducted by the monster. Gang-du mounts a rescue operation with the help of his family, but the government is concerned about a SARS-like epidemic!