LOUISE MURRAY / SCIENCE PHOTO LIBRARY LOUISE MURRAY / SCIENCE PHOTO LIBRARY
Mushroom coral (Fungia sp.) fluorescing green under blue light at night. It is thought the fluorescent glow may attract symbiotic algae, or protect the coral from the intense ultraviolet light of the sun in shallow water. Photographed at Tondoba Bay, Marsa Alam, Red Sea, Egypt.
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