FOCA class (1936)
The three units of the Foca class, (Foca, Atropo and Zoea), were minelayers submarines, reason why they transported 36 mines that were sent at sea by the stern through two mine chutes. They were put in service between 1936 and 1938 and soon they were involved in the Mediterranean fights against British forces. Foca sank near Haifa in October 1940, while lying a mine barrage, probably by hitting a British mine, but the Atropo and Zoea survived the War and remained in service until 1947 when they were scrapped.
FOCA class (1936) gallery and more info