Experience the Magic of La Parguera’s Bioluminescent Bay
The bioluminescent bay in La Parguera is an extraordinary natural wonder. Home to year-round glow, it is one of only five permanent bio-bays in the world—and Puerto Rico proudly boasts three of them. A trip to a bio-bay is a must-do vacation experience, and at Paradise, we offer two unforgettable tour options:
- Sunset Bio Bay Cruise
- Bio Bay Tour
La Parguera is the only bio-bay in Puerto Rico where swimming is permitted. We provide snorkels and masks so you can dive in and swim among glittering micro-organisms. If you’re booking the Sunset Bio Bay Cruise, before we head out, enjoy a complimentary light dinner of homemade empanadillas, cold beer, and soda while our knowledgeable crew shares insights about Parguera’s unique ecosystem.
Puerto Rico Bioluminescent Bay FAQs
What exactly is a bioluminescent bay?
Bioluminescence is the natural production and emission of light by a living organism, caused by a chemical reaction inside its body. Fireflies are a well-known terrestrial example, but this phenomenon is most famous in marine environments.
What causes the glow in La Parguera?
While various ocean creatures—including certain jellyfish, deep-sea sharks, and bacteria—can produce light, our bay in La Parguera is illuminated by microscopic organisms called dinoflagellates (p. Bahamense). When disturbed (such as by swimming or moving through the water), they emit a delicate, glittering blue-green spark. Scientists believe this light acts as a defense mechanism to startle predators. But you’ll get to know them better once our crew gives you all the insight during your visit!
Why are Puerto Rico’s bio-bays so rare?
Unlike temporary phenomena like “red tides” that cause sporadic blooms elsewhere, Puerto Rico’s bio-bays are enclosed ecosystems that hold high concentrations of dinoflagellates year-round.
Join us for a bio-bay tour in La Parguera and dive into one of nature’s most enchanting worlds!