Nansenflua is an undersea rock in the northern part of Rekvedbukta off the southeastern coast of Jan Mayen in the Arctic Ocean.

The shoal is named after the ship HNoMS Fridtjof Nansen, which sank after striking the previously uncharted rock in November 1940.

[6] Under the command of the exiled Royal Norwegian Navy, the offshore patrol vessel HNoMS Fridtjof Nansen visited Jan Mayen in September 1940, in order to destroy and evacuate the weather station northeast of Eggøya.

The ship returned in November of the same year to disrupt German plans to re-establish a weather station on the island.

Entering the bay of Rekvedbukta on 8 November 1940 in calm weather, the ship collided with the hitherto unknown shoal, rapidly heeling 45°.