The Office of Hawaiian Affairs has been named as co-trustee to the Papahānaumokuākea Marine National Monument. The area is the largest fully protected conservation area in the US, encompassing 583,000 square miles of ocean, small islands, and atolls in the Northwestern Hawaiian Islands. It's home to more than 7,000 marine species, a quarter of which are found only in the Hawaiian Archipelago. It’s also a significant cultural site to Native Hawaiians, containing both historical and spiritual places.