Which strait lies between the Indonesian islands of Borneo and Sulawesi?

The Makassar Strait lies between the Indonesian islands of Borneo and Sulawesi.

It is a north-south passage in the western Pacific, linking the Celebes Sea in the north with the Java Sea in the south. Borneo’s eastern coast forms the western side, while Sulawesi’s western coast forms the eastern side. Both islands are divided among several Indonesian provinces and neighboring countries, but the strait itself is chiefly associated with Indonesia.

The Makassar Strait is part of the Indonesian Throughflow, the movement of tropical Pacific water toward the Indian Ocean through the archipelago. It is also a major route for commercial shipping and regional fishing. The strait’s name can be misleading: Makassar is a major city on Sulawesi, but the city sits on the Makassar Strait rather than defining the entire waterway.