Kijini Primary School students learn to float, swim and perform rescues on Oct. 25, 2016, in the Indian Ocean at Muyuni, Zanzibar. "It was phenomenal to watch their facial expressions and body language shift from total fear and utter trepidation to peaceful, and then to what ultimately revealed itself as confidence and joy," says photographer Anna Boyiazis, who won one of this year's awards. (Anna Boyiazis)
