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In this Feb. 26, 2017 photo, men play a game of shells called "hawalees" next to the coastal village of Haramel's mosque In this Mar. 3, 2017 photo, a wave colored with dark green algae washes on the beach of Bandar al-Jissah, Oman underneath Bassem a In this Feb. 26, 2017 photo, marine ecologist Ahmad al-Alawi, 26, warns, during an interview on the cliffs above the marina of Ban In this March 2, 2017 composite of images from the USGS Landsat 8 satellite and the NASA Aqua-MODIS satellite, a mass of the algae In this Mar. 3, 2017 photo, a wave colored with dark green algae washes on the beach of Bandar al-Jissah, Oman. Across the planet, In this March 2, 2017 photo taken through a microscope at 50x magnification, algae of the Noctiluca scintillans species are illumi In this Feb. 26, 2017 photo, a boat drifts under a coastal arch into a green algae mass in the Gulf of Oman. Scientists who study In this Feb. 26, 2017 photo, marine biologist Khalid al-Hashmi, 50, holds a jar with a sample of an algae blooming in the Gulf of In this Feb. 14, 2015 composite image from the NASA Aqua-MODIS satellite, a mass of the algae noctiluca scintillans blooms in the In this Mar. 3, 2017 photo, green algae swirls on the beach of Bandar al-Jissah in Oman. The Gulf of Oman turns green twice a year