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Bioluminescent Bay

An attraction at Vieques, Puerto Rico

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A Quick Tip by EcoMama

  • Dec 28, 2009
  • by
One of the most amazing experiences I have ever had! I would do this again at Vieques at any opportunity :P
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More Bioluminescent Bay - Vieques, ... reviews
review by . December 16, 2009
A natural wonder of the world.
   When I first heard about the Bio-bay I was watching a slide show video about it on YouTube. I immediately thought it was one of the many hoax videos you see on YouTube. You know the ones I’m talking about, the flying saucers with the fishing pole visible in every third frame or the media-mashup where Stephen Colbert is having a light-saber duel with Darth Maul to the soundtrack of a John McCain speech. Despite a lack of Colbert flair, the slide show video does show a guy kayaking …
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Anastasia B ()
Ranked #22
I am a woman, a wife, a mother, a daughter, a sister, an aunt, a cousin, a friend, a Christ follower, an Interior Designer, a blog author, a cook, an artist, an eco-conscious consumer, a nature lover, … more
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About this attraction


The Mosquito Bioluminescent Bay on the Island of Vieques, Puerto Rico (or "Bio Bay" as it is sometimes called), is the world's largest and brightest. The bioluminescent bay is the most bioluminescent in the World as determined by the Guinness Book of World Records in 2008. It contains up to 160,000 microscopic dinoflagellates per liter of water. When agitated, these microscopic organisms (Pyrodinium bahamense or swirling fire) react, emitting a blue-green light for about a decimal of a second.

There are other bioluminescent bays around the island, but the Mosquito Biobay is the one that shines with the most intensity, its shallow and small entrance from the sea impedes the waves from washing away the dinoflagellates; and the mangrove trees, with their decomposition process, provides abundant food for the micro-organisms.


The luminescence is caused by micro-organisms (dinoflagellates) which glow whenever the water is disturbed, leaving a trail of neon blue. These half-plant, half-animal organisms emit a flash of bluish light when agitated at night. The high concentration of these creatures can create enough light from which to read a book. A combination of factors creates the necessary conditions for bioluminescence: red mangrove trees surround the water (the organisms feed off the dead leaves); a complete lack of modern development around the bay; the water is cool enough and deep enough; and a small channel to the ocean keeps the ...

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Travel, Water, Puerto Rico, Swimming, Kayaking, Vieques, Biobay, Dinoflagellates, Bioluminescent Bay, Morgali Photography, Puerto Rico Travel


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