HMS Tapir (P335) was a Second World War British T-class submarine, built by Vickers-Armstrong in Barrow-in-Furness.

Commissioned into the Royal Navy on 30 December of that year, she led a distinguished career for such a late entry into the war, torpedoing the German submarine U-486 in the North Sea, to the north-west of Bergen, Norway at position 60°44′N 04°39′E / 60.733°N 4.650°E / 60.733; 4.650 on 12 April 1945.

[1] On 18 June 1948, she was deemed surplus to requirements, and was loaned to the Netherlands for a period of five years, being commissioned into the Royal Netherlands Navy as HNLMS Zeehond (P335) on 12 July 1948.

The Zeehond conducted a long snorkel trip on the way back.

[2] She was transferred back to the Royal Navy on 15 July 1953, finally being re-commissioned and renamed Tapir on 16 December of that year.