The Top Destination for Bio Bays is Puerto Rico, Home to Three of the Best

Puerto Rico is home to Fajardo, Vieques, and La Parguera, the world’s most captivating "bio bays," where the water glows with a stunning natural light show.
The Top Destination for Bio Bays is Puerto Rico, Home to Three of the Best
Swimming in the La Parguera Bio BayDiscover Puerto Rico DMO / OMARK REYES

Puerto Rico is home to some of the world’s most captivating bioluminescent bays, or "bio bays," where the water glows with a stunning natural light show. Here's a guide to the top three bio bays to visit on your next trip to Puerto Rico: Fajardo, Vieques, and La Parguera Bio Bays.

1. Fajardo Bio Bay: Kayak Through a Glowing Lagoon

The Top Destination for Bio Bays is Puerto Rico, Home to Three of the Best
Fajardo's Laguna Grande is one of the most accessible bio bays on the island. Discover Puerto Rico DMO / OMARK REYES

Located on the northeastern tip of Puerto Rico, it’s perfect for an evening kayak adventure. As you paddle through the mangroves, every stroke lights up the water with a mesmerizing blue-green glow, thanks to the millions of microscopic organisms called dinoflagellates. This spot is ideal for first-timers seeking a shorter drive from San Juan and a spectacular experience under the stars.

Puerto Rico Bio Bay Tours

Full-Moon Fajardo Bio Bay Kayak Adventure

Our Full Moon Fajardo Bio Bay Kayak Adventure is the perfect nature adventure under a full moon, and if your stay in Puerto Rico happens to fall during the full moon stage you don’t have to miss out on our Night Kayaking Tours!

2. Vieques Bio Bay: The Brightest Glow in the World

The Top Destination for Bio Bays is Puerto Rico, Home to Three of the Best
Kayaking in bioluminescent bays.Discover Puerto Rico DMO / OMARK REYES

Mosquito Bay on Vieques Island holds the Guinness World Record for being the brightest bioluminescent bay on Earth. Located on the east coast of the island, this bio bay offers an extraordinary show of light. The high concentration of dinoflagellates here makes for an intensely bright display. Most tours involve glass-bottom kayaks or boats, providing a crystal-clear view of the glowing waters beneath. If you want a truly out-of-this-world experience, Mosquito Bay is the ultimate destination.

Friendly and knowledgeable tour guides await to give you an unforgettable experience at the Bio Bay, you can explore it on a kayak tour or an electrically powered boat.

The Top Destination for Bio Bays is Puerto Rico, Home to Three of the Best
Puerto Rico's Best Kept Secret: Culebra & Vieques: Spanish Virgin Islands

3. La Parguera Bio Bay: Swim in the Luminescent Waters

La Parguera Bio Bay, Vieques Puerto Rico
La Parguera Bio Bay, Vieques Puerto Rico Discover Puerto Rico DMO / OMARK REYES

Unlike Fajardo and Vieques, La Parguera Bio Bay on Puerto Rico's southwest coast is the only bio bay where visitors are allowed to swim in the glowing waters. This bay offers a more laid-back experience, where locals and tourists alike can take a dip and see the glow surround them with every movement. Boat tours are also available, giving a relaxed and scenic way to explore this lesser-known but equally magical bio bay.

Book with Borikua Tours

Bioluminescent Bay & Sand Bar at La Parguera: Borikua Tours includes transportation: Enjoy the different landscapes of Puerto Rico during a road trip from San Juan. When everything is dark, cruise to the Bio Bay and be ready to jump in the water.

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