Three ships of the Royal Navy have been named HMS Swordfish after the fish.
The first HMS Swordfish was a 330-ton destroyer launched in 1895 and sold in 1910.The second HMS Swordfish was a steam-powered submarine launched in 1916. She was converted into a surface patrol boat in 1917 and renamed S1.The most recent HMS Swordfish was an S class submarine launched in 1931 and sunk by a naval mine in the English Channel in 1940.