USS Darter (SS-576), a unique submarine based on the Tang-class, but incorporating many improvements, was the second ship of the United States Navy to be named for the darter (fish), a type of small American fresh-water fish closely related to the perch. The contract to build Darter was awarded to the Electric Boat Division of General Dynamics Corporation in Groton, Connecticut on 30 June 1954 and her keel was laid down on 10 November 1954. She was launched on 28 May 1956 sponsored by Mrs. G.L. Russell, and commissioned on 20 October 1956, with Lieutenant Commander Ralph R. Blaine in command.