LOUISE MURRAY / SCIENCE PHOTO LIBRARY LOUISE MURRAY / SCIENCE PHOTO LIBRARY
Fluorescent coral and brittle star. Blue light photograph of coral fluorescing green and a non-fluorescing brittle star (centre). Some species of coral glow, or fluoresce, under blue light. It is thought the glow may attract symbiotic algae, or protect the coral from the intense ultraviolet light of the Sun in shallow water. Photographed in Thailand.
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