Besides being adorable, Hawaiian monk seals are a critically endangered species. In 2012, NOAA estimated that there were about 1,153 monk seals left in Hawaii. What's threatening the Hawaiian monk seal? According to NOAA, food limitation, shark predation, habitat loss and male aggression all play a part. But derelict fishing gear - abandoned nets and longline fishing hooks - are the greatest threat to the seals. "Three of Ua Malie's siblings died," Yuen says. "In 2015 Ola Loa (Ua Malie's younger sister) died after surgery complications to remove a large hook from her throat. In 2008 and 2006 respectively, Penelope and Hoku drowned after getting caught in fishing nets."