The nearly extinct Hawaiian species of this mammal uses Midway's beaches to breed
.... 
Video: How to Share Hawaii's Beaches with Endangered Monk Seals [DOC] [TLE] Hawaiian Monk Seals - Friends of Midway Atoll [PAR] Aug 27, 2016 ... Hawaiian Monk Seals breed and haul out on sand, corals, and volcanic rock; 
they are often seen resting on beaches during the day.