Charter operators are located right in the center of town. Photo by http://www.flickr.com/photos/arturodonate/2877280176.

If you happen to be visiting Puerto Rico during a moonless night, you absolutely MUST find your way to the small town of La Parguera to see its bioluminescent bay. From the docks in the center of town, choose one of the countless excursions services.

When darkness falls (preferably between the hours of 7 and 8 p.m.), hop aboard and motor through the inky blackness. As you approach the bay, watch the rooster tail of water generated by the boat motor begin to sparkle. Now trail your hand in the water; millions of tiny organisms light it up and blue-green glowing lights stream from your submerged fingertips.

Further inside the sheltered cove, the water sparkles like a billion fireflies, darting here and there. Step off the boat for a swim and watch your entire body light up in a neon blue-green outline, flashing and sparkling with every movement.

The phosphorescence generated by these microscopic organisms is believed to be part of their natural defense system. Many scientists believe they light up so their predators can see more desirable prey – and thus leave them alone.

Bioluminescense outlines a swimmer. Photo by http://www.whattodoinpr.com.

The phenomenon occurs in other warm seas around the world, but only in Puerto Rico does it happen each and every night, although the phenomenon is best seen when the moon is new.

La Parguera is located on the southwestern corner of Puerto Rico, about a four hour drive from San Juan. There are numerous accommodations in La Parguera, and the seafood at the local restaurants is some of the best on the island. Additionally, this area of Puerto Rico is rich in history, landmarks, and wonderful beaches.

Article by Barbara Weibel of Hole In The Donut Travels