USS Sea Tiger was a fictional submarine presumably named for the barracuda. No vessel of the United States Navy has been given that name, but the 1959 movie Operation Petticoat, starring Cary Grant and Tony Curtis, and the short-lived 1977-1978 television series of the same name, were set aboard a fictional Sea Tiger.

The sub was most-closely based on the actual WWII-era submarine USS Sealion (SS-195), which like its film counterpart, was sunk at the pier at Cavite Navy Yard, the Philippines, on 10 December 1941 with the loss of 5 crewmembers.

The Sea Tiger in the movie was portrayed by three different American WWII era submarines:

• Queenfish (SS-393), in the opening and closing scenes (circa 1959), in which the "393" on the conning tower is visible,
• Archerfish (SS-311), for all the WWII scenes where the boat was painted the standard gray and black,
• Balao (SS-285), for all the scenes in which Sea Tiger was painted pink.