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