Core question interpretation:
The user seems to be asking for the location or details of the Sargasso Sea (Sargassohavet) with some fragmented words. I’ll provide a concise, accurate overview of what the Sargasso Sea is and where it sits. Answer:

• The Sargasso Sea is a distinct region of the western North Atlantic Ocean. It lies roughly between 20°N and 35°N latitude and 40°W and 70°W longitude, centered in a gyre formed by the surrounding major currents.

• It is unique in that it is bounded by ocean currents rather than by land borders, making it the only “sea” without a coastline. Bermuda lies near its western edge, and the area is characterized by clear, blue water and floating mats of brown algae from the genus Sargassum.

• Its name derives from the floating Sargassum seaweed that forms vast “weeds” or beds in the open ocean, providing habitat for a variety of marine organisms.

If you meant something else by “var ligger sargassohavet” (where the Sargasso Sea is located) or want more precise coordinates, historical context, or ecological details, specify and I can tailor the information.