SS Prunelle was a British cargo ship that the German submarine SM UB-112 torpedoed on 22 August 1918 in the North Sea 2 nautical miles (3.7 km) south east of Blyth, Northumberland.

[2] Prunelle left London and set sail for Dundee on 22 August 1918 with a crew of 16 and a cargo of jute on board.

At 1.40 pm on the same day as it had left London, Prunelle was targeted by the German submarine SM UB-112 when the ship was 2 nautical miles (3.7 km) south east of Blyth, Northumberland.

The following explosion and rapid sinking of the ship killed 12 of the 16 crewmen on board including Captain Storm and second officer Cheetham.

The four survivors were rescued shortly after, having clung themselves to the ships wreckage, and were brought ashore at Blyth.