Are bioluminescent beaches year round?

The warmest months of the year are the best times to see bioluminescent plankton, like Dinoflagellates. That is because they multiply in “blooms.” The warm water makes them abundant and they blanket the water. Usually bioluminescent plankton begin to appear in May and can last through October.



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1. Mosquito Bay, Puerto Rico. Hidden on the southern coast of Vieques, off the east coast of mainland Puerto Rico, this narrow inlet widens into a dolphin-shaped bay of mangroves that protects the brightest occurrence of bioluminescence in the world according to Guinness World Records.

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Mosquito Bay, Puerto Rico Hidden on the southern coast of Vieques, off the east coast of mainland Puerto Rico, this narrow inlet widens into a dolphin-shaped bay of mangroves that protects the brightest occurrence of bioluminescence in the world according to Guinness World Records.

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Bioluminescent algae can have severe effects on human health and should not be touched. Do not swim in waters containing algal blooms, no matter how beautiful they are. Direct contact could lead to skin infections or even death.

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