Maro Reef

Maro Reef is a largely submerged coral atoll located in the Northwestern Hawaiian Islands. It sits within the boundaries of the massive Papahānaumokuākea Marine National Monument.

It is distinguished by being the most extensive coral reef within the entire Hawaiian archipelago. Unlike other Hawaiian islands, it forms a complex network of shallow reefs rather than a centralized landmass.

No, access to Maro Reef is highly restricted and generally prohibited to the general public. Only scientific researchers with specific federal permits are allowed to visit the area to study its pristine ecosystem.

Because it is largely submerged and lacks a protective landmass, it is highly vulnerable to damage from ocean swells and storm waves. Additionally, rising sea surface temperatures pose a severe threat of mass coral bleaching.