HMS Tantalus was a British submarine of the third group of the T class.

Tantalus also damaged a tug and the Japanese submarine chaser Ch 1.

She also attacked, but missed the Japanese submarine I-166, which was sunk later that day by HMS Telemachus.

Tantalus survived the war and continued in service with the Royal Navy, finally being scrapped at Milford Haven in November 1950.

This article about a specific naval submarine of the United Kingdom is a stub.