USS Entemedor (SS-340), a Balao-class submarine, was a ship of the United States Navy named for the entemedor, a fish of the electric ray family found in shallow waters from Baja California to Panama.
SS-340, originally named Chickwick, was renamed Entemedor on 24 September 1942 and launched on 17 December 1944 by Electric Boat Co., Groton, Conn.; sponsored by Mrs. E. V. Izac; and commissioned on 6 April 1945, Lieutenant Commander W. R. Smith, Jr. in command.