A high-endemism deep reef fish community at 300 feet, Kure Atoll, Papahānaumokuākea Marine National Monument. Every fish in the picture is a Hawaiian endemic species (not known from anywhere else except Hawaiʻi). Deep reefs at Kure Atoll were discovered to have the highest levels of endemism known from any marine ecosystem on Earth. Credit: NOAA and Richard Pyle/Bishop Museum