Mosquito bay
The world's most bioluminescent bay
Category Watery Wonders, Fascinating Fauna, Bioluminescent Spots
At night, Mosquito Bay flashes green with an eerie ethereal light. Bright blue tracer lines suddenly appear in the water as small fish dart through the blackness. But this illumination has nothing to do with spirits or aliens: Mosquito Bay happens to be one of the most bioluminescent bodies of water in the world.
Bioluminescence is a form of natural light created by living organisms converting internal chemical energy into light. The light in Mosquito bay is created by tiny organisms called dinoflagellates (specifically *Pyrodimium bahamense* or "swirling fire"), and Mosquito bay contains an astonishing number - roughly 700,000 per single gallon of water. Although they are microscopic, the effective size of the light they give off is a hundred times larger than their own bodies, and in great numbers they light up like an underwater aurora borealis.
Trapped by a curve in the bay's opening and fed by the surrounding mangroves, the dinoflagellates find Mosquito Bay a perfect home. Thought to bioluminesce as a defense mechanism - to attract predators that can ward off the small fish who eat them - dinoflagellates make light upon sensing any movement in the water, swirling out bright blue-green plumes that eventually diffuse back into the dark stillness of the bay. This makes swimming in the bay a truly astonishing - not to mention surreal - experience.
There are a number of outfits that will take people out to the bio-bay, but be sure select one that uses kayaks, and don't wear bug spray, as gas and deet kill dinoflagellates. In addition, be sure to visit on a night with no or little moonlight, as seeing the bioluminescence in near-total darkness is truly amazing.
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- Address Mosquito bay, Vieques, Puerto Rico, United States
Comments
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Anonymous
September 27, 2009
La Parguera in Puerto Rico also has an amazing bioluminescent bay. I've been to Mosquito Bay, and I think that the Parguera bay was more impressive.
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