SS Canonesa was a refrigerated cargo steamship that was built in Ireland in 1920 and sunk by a u-boat in the Atlantic Ocean in 1940.

This was a joint venture between Furness, Withy and Houlder Line to carry chilled and frozen meat and other produce from South America to the United Kingdom.

[10] She joined Convoy HX 72, which had left Halifax, Nova Scotia on 9 September and was bound for Liverpool.

At 2310 hrs on 21 September U-100 joined the attack by firing a spread of torpedoes at HX 72, hitting Canonesa and two other ships.

Canonesa sank in the Western Approaches about 340 nautical miles (630 km) west of Bloody Foreland with the loss of one member of her crew.