HMS Candytuft was a Flower-class corvette, built for the Royal Navy during the Second World War, and was in service in the Battle of the Atlantic.

In 1942 she was transferred to the United States Navy as part of the reverse Lend Lease arrangement and renamed USS Tenacity, one of the Temptress-class gunboats.

In 18 months service, she escorted 13 North Atlantic and two Gibraltar convoys, assisting in the safe passage of over 500 ships, though some were lost subsequently.

Candytuft was transferred on 4 March 1942, but required an extensive refit; she was finally commissioned into the USN on 11 June 1942 as USS Tenacity, one of the Temptress-class gunboats.

After 17 months service there Tenacity was moved, in January 1944, to the Eastern Sea Frontier, based at Boston.