Coral Cities of Papahānaumokuākea Marine National Monument

Miles below the surface, branching high rises and glassy structures sprout from the seafloor. These undersea cities of colorful corals and glass sponges serve as refuge and restaurant for other deep sea animals trying to catch food from currents moving around underwater mountains. These were just a few of the sights documented while exploring unsurveyed seamounts of Papahānaumokuākea Marine National Monument.