[1] It depicts one of the most popular myths in Germanic mythology, Thor's fishing trip, which was known to Fuseli through P. H. Mallet's 1755 book Introduction à l'histoire du Dannemarc, translated to English by Thomas Percy in 1770 as Northern Antiquities.

The Zurich artist had also traveled to the Italian peninsula, where he was able to admire the art of ancient masters, such as Michelangelo Buonarroti, whose sculptural nudes where a great source of inspiration for this canvas.

This mythological-themed painting represents the Norse god Thor standing on the prow of a boat with Hymir at the helm, as he is about to strike a sword blow against the sea serpent of Midgard, the Jörmungandr (or Miðgarðsormr), which he holds tight with a chain stuck in his mouth probably with a harpoon.

The Jörmungandr can recall in a literal sense the serpentine line that was present in Italian mannerist art, which had been studied by the Swiss painter.

Finally, the scene is set among the high waves of a stormy sea, in the middle of the night, making the work a nocturne in which naturalness is lost in favor of monstrosity and fantasy.