Bioluminescence occurs from the production and emission of light by a living organism. Bioluminescence is a popular phenomenon in marine vertebrates and invertebrates, but also occurs in some fungi, terrestrial invertebrates such as fireflies, and other microorganisms including bacteria!
There are three bioluminescent bays (bio-bays) in Puerto Rico. One in the Southwest – “La Parguera,” one on Vieques – “Mosquito Bay,” and the one in Fajardo – “La Laguna Grande.” Out of all three, Mosquito Bay is the brightest, and La Parguera is the least bright.
These bays are lit up by dinoflagellates which are oceanic plankton. They generate a beautiful emerald green illumination.
The bays are protected by de gob. And you can kayak and swim in them when you go to the tours. The boat they use is a special one with no motor because the motors damage the organisms that make it glow. That’s the reason why the one in “la parguera” is the least bright out of the 3, but now is protected and no motor boats are permitted.
Watch this video to see the amazing bioluminescence for yourself!
The image below is of the Mosquito Bay in Vieques.