Puerto Rico is home to three of the world’s five bioluminescent bays, making it one of the most extraordinary destinations for travelers seeking a rare natural wonder. Mosquito Bay in Vieques, Laguna Grande in Fajardo, and La Parguera in Lajas each offer a breathtaking experience where microscopic organisms light up the water with an ethereal blue glow. These unique ecosystems attract thousands of visitors each year, making them a must-see for anyone traveling to Puerto Rico.

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    Noel Cruz in front a lagoon.

    Noel Cruz, Operations Manager at Kayaking Puerto Rico, shares tips on enjoying bio bays while protecting them.

    Yet, with this privilege comes responsibility. Protecting Puerto Rico’s bio bays ensures that their brilliance remains for future generations. As part of the "Return the Love" initiative, Puerto Rico invites travelers to embrace the Live Boricua spirit—not just by experiencing the Island’s wonders, but by actively caring for them. As actor Amaury Nolasco expressed in his heartfelt "Love Letter from Puerto Rico," to love this Island is to nurture and respect its essence. That same love extends to its luminous waters.

    To better understand how visitors can experience the best bioluminescent tours in Puerto Rico while preserving these delicate ecosystems, Noel Cruz, operations manager at Kayaking Puerto Rico and a subject matter expert in bio bay conservation, shares essential tips for responsible travel.

    Visit Puerto Rico Responsibly

    Kayakers enjoy drifting through a bioluminescent bay.

    Kayakers paddle through the bioluminescent bay in Vieques. 

    How to Experience the Bioluminescent Bays Responsibly

    1. Use eco-friendly insect repellent – If you’re visiting Laguna Grande in Fajardo, Mosquito Bay in Vieques, or La Parguera in Lajas, opt for creams or balms instead of sprays. Apply them at least 30 minutes before your tour to prevent harmful chemicals from entering the water.
    2. Know the rules – Unlike Mosquito Bay in Vieques and Laguna Grande in Fajardo, where swimming is not permitted to protect the fragile dinoflagellates, La Parguera in Lajas is the only bioluminescent bay in Puerto Rico where motorboat navigation is permitted at night. If you choose to visit, follow all safety guidelines.
    3. Let the darkness enhance the glow – The less artificial light, the brighter the bioluminescence. Avoid using flashlights, phone screens, or any unnecessary illumination during your visit.
    4. Respect the ecosystem – Keep noise levels low and avoid touching or removing anything from the water. Preserving these natural environments helps maintain the beauty of Puerto Rico’s bioluminescent tours for years to come.
    Two women paddling in a kayak during a night at Vieques' bioluminescent bio bay.

    Have a magical night at Vieques' bioluminescent bay.  

    Why Visit Puerto Rico’s Bioluminescent Bays?

    Puerto Rico’s bio bays are among the most spectacular in the world. Mosquito Bay in Vieques holds the Guinness World Record for the brightest bioluminescent bay, while Laguna Grande in Fajardo is the most accessible from San Juan. La Parguera in Lajas is unique as the only bio bay in Puerto Rico where visitors can take boat tours and even swim in the glowing waters.

    Visiting these destinations is a once-in-a-lifetime experience, and responsible tourism ensures they remain a top attraction in Puerto Rico for generations.

    Explore Puerto Rico’s Bio Bays

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    Carla Bonilla
    Carla Bonilla Martínez is Discover Puerto Rico’s Web Content Manager, part-time florist, and full-time foodie, born, raised, and based in Puerto Rico. She blends her passion for culture, digital strategy, and storytelling to create engaging digital experiences. You can usually find her exploring the newest spots across the Island.
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