USS Sailfish (SS-192), a Sargo-class submarine, was originally named Squalus. Her keel was laid on 18 October 1937 by the Portsmouth Naval Shipyard in Kittery, Maine, as Squalus, the only ship of the United States Navy named for the squalus. She was launched on 14 September 1938 sponsored by Mrs. Thomas C. Hart (wife of the Admiral), and commissioned on 1 March 1939, with Lieutenant Oliver F. Naquin in command. Due to mechanical failure, Squalus sank during a test dive on 23 May 1939. She was raised, renamed, and recommissioned on 15 May 1940 as Sailfish.