HSwMS Sälen (Sä), (Swedish for "The seal") was the second Hajen-class submarine of the Swedish Navy.

[1] HSwMS Sälen was launched on 3 October 1955 by Saab Kockums, Malmö and commissioned on 8 April 1957.

She was decommissioned on 1 July 1980 and later scrapped in Gävle in 1990.

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