Zanzibar’s coastal women have turned to sponges instead of traditional seaweed, which is affected by rising ocean temperatures.

Zanzibar — In the early morning, as the tide pulls away, Zulfa Abdallah ties her scarf tightly around her head. She adjusts her goggles, places a snorkel across her forehead, and wades into the ...

IN the early morning, as the tide pulls away, Zulfa Abdallah ties her scarf tightly around her head. She adjusts her goggles, places a snorkel across her forehead, and wades into the chest-deep waters ...