A disappearing body leads a detective and his sidekick into an encounter with a gill man.
Unfortunately the movie Swamp of the Lost Monster is not yet available on Paramount Plus.
| Directing | Rafael Baledón | Director |
| Writing | Ramón Obón | Writer |
| Sound | Gustavo César Carrión | Original Music Composer |
| Production | Guillermo Castillo | Casting |
| Camera | Raúl Martínez Solares | Director of Photography |
| Editing | Juan José Marino | Editor |
| Art | Manuel Ladrón de Guevara | Set Decoration |
| Production | Alfredo Ripstein Jr. | Producer |
