Port Sinister
- Annu: 1953
- Paese: United States of America
- Genre: Adventure, Crime, Science Fiction
- Studio: American Pictures Company
- Parolla chjave: piracy, giant crab, sunken city
- Direttore: Harold Daniels
- Cast: James Warren, Lynne Roberts, Paul Cavanagh, House Peters Jr., Robert Bice, William Schallert