The remote atolls of Bikar and Bokak in the Marshall Islands remain largely preserved
The uninhabited atolls of Bikar and Bokak lie in the northern Marshall Islands, a country in the central Pacific Ocean, roughly halfway between Hawaii and Australia. Far from any continental landmass, they are among the most remote places on Earth. Both atolls belong to the National Marine Sanctuaries of Bikar and Bokak, established in 2025, which together cover approximately 48,000 km² of ocean. A study published on 11 November 2026 in Frontiers in Marine Science documents extensive seabird colonies, mature native vegetation, and reef fish communities dominated by herbivores, sharks, and other predators. The study describes both atolls as relatively intact ecosystems, which are becoming increasingly rare worldwide.
These images, acquired by Copernicus Sentinel-2 satellites on 22 February 2026 and 1 October 2026, show the atolls of Bokak (left) and Bikar (right), respectively. The turquoise of their reefs and shallow waters contrasts with the deeper blue of the lagoons and the near-black of the surrounding Pacific Ocean.
Copernicus satellite imagery supports the observation of remote marine ecosystems, providing valuable information for habitat conservation, environmental assessment, and the long-term monitoring of protected areas.
