Maldives Beach Looks Like Starry Night Sky.At night, however, the red waters take on a completely different hue. These organisms react to changes in water tension and to acidity by giving off light, so every wave break and paddle causes them to give off light. Surfers who surf a red tide at night leave a trail of shining water, and steps taken in soaked sand leave shimmering imprints. Boats traveling through bioluminescent red tides leave especially impressive light trails.
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From @patrickbaxter