USS Trigger (SS-564)
USS Trigger (SS-564), a Tang-class submarine, was the second ship of the United States Navy to be named for the triggerfish, any of numerous deep-bodied fishes of warm seas having an anterior dorsal fin with two or three stout erectile spines.
Her keel was laid down on 24 February 1949 at Groton, Connecticut, by the Electric Boat Company. She was launched on 14 June 1951 sponsored by Mrs. Roy S. Benson, and commissioned on 31 March 1952 with Commander Edward L. Beach in command.
Read more about USS Trigger (SS-564): History, Livio Piomarta (S-515)