HMS Acanthus was a Flower-class corvette of the Royal Navy.

Acanthus was one of ten Flower-class corvettes ordered on 21 September 1939, in the fourth of a series of orders.

She was laid down at Ailsa Shipbuilding Company's Troon shipyard on 21 December 1939, was launched on 26 May 1941 and completed on 1 October 1941.

[2][3] In 1942, the vessel was transferred to the Norwegian armed forces in exile and became the Norwegian ship HNoMS Andenes.

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